Change links from http:// to https:// (#1695)

diff --git a/README.md b/README.md
index 55dc39d..2bf1520 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Cobra is a library for creating powerful modern CLI applications.
 
-Cobra is used in many Go projects such as [Kubernetes](http://kubernetes.io/),
+Cobra is used in many Go projects such as [Kubernetes](https://kubernetes.io/),
 [Hugo](https://gohugo.io), and [Github CLI](https://github.com/cli/cli) to
 name a few. [This list](./projects_using_cobra.md) contains a more extensive list of projects using Cobra.
 
@@ -28,7 +28,7 @@
 * Automatically generated man pages for your application
 * Command aliases so you can change things without breaking them
 * The flexibility to define your own help, usage, etc.
-* Optional seamless integration with [viper](http://github.com/spf13/viper) for 12-factor apps
+* Optional seamless integration with [viper](https://github.com/spf13/viper) for 12-factor apps
 
 # Concepts
 
diff --git a/doc/md_docs.md b/doc/md_docs.md
index 5c87062..1659175 100644
--- a/doc/md_docs.md
+++ b/doc/md_docs.md
@@ -85,7 +85,7 @@
 }
 ```
 
-The `filePrepender` will prepend the return value given the full filepath to the rendered Markdown file. A common use case is to add front matter to use the generated documentation with [Hugo](http://gohugo.io/):
+The `filePrepender` will prepend the return value given the full filepath to the rendered Markdown file. A common use case is to add front matter to use the generated documentation with [Hugo](https://gohugo.io/):
 
 ```go
 const fmTemplate = `---
diff --git a/doc/rest_docs.md b/doc/rest_docs.md
index 6098430..3041c57 100644
--- a/doc/rest_docs.md
+++ b/doc/rest_docs.md
@@ -85,7 +85,7 @@
 }
 ```
 
-The `filePrepender` will prepend the return value given the full filepath to the rendered ReST file. A common use case is to add front matter to use the generated documentation with [Hugo](http://gohugo.io/):
+The `filePrepender` will prepend the return value given the full filepath to the rendered ReST file. A common use case is to add front matter to use the generated documentation with [Hugo](https://gohugo.io/):
 
 ```go
 const fmTemplate = `---
diff --git a/doc/yaml_docs.md b/doc/yaml_docs.md
index 1a9b7c6..172e61d 100644
--- a/doc/yaml_docs.md
+++ b/doc/yaml_docs.md
@@ -82,7 +82,7 @@
 }
 ```
 
-The `filePrepender` will prepend the return value given the full filepath to the rendered Yaml file. A common use case is to add front matter to use the generated documentation with [Hugo](http://gohugo.io/):
+The `filePrepender` will prepend the return value given the full filepath to the rendered Yaml file. A common use case is to add front matter to use the generated documentation with [Hugo](https://gohugo.io/):
 
 ```go
 const fmTemplate = `---
diff --git a/projects_using_cobra.md b/projects_using_cobra.md
index 1d2266d..4ac87d3 100644
--- a/projects_using_cobra.md
+++ b/projects_using_cobra.md
@@ -1,8 +1,8 @@
 ## Projects using Cobra
 
 - [Arduino CLI](https://github.com/arduino/arduino-cli)
-- [Bleve](http://www.blevesearch.com/)
-- [CockroachDB](http://www.cockroachlabs.com/)
+- [Bleve](https://blevesearch.com/)
+- [CockroachDB](https://www.cockroachlabs.com/)
 - [Cosmos SDK](https://github.com/cosmos/cosmos-sdk)
 - [Datree](https://github.com/datreeio/datree)
 - [Delve](https://github.com/derekparker/delve)
@@ -14,14 +14,14 @@
 - [Github CLI](https://github.com/cli/cli)
 - [GitHub Labeler](https://github.com/erdaltsksn/gh-label)
 - [Golangci-lint](https://golangci-lint.run)
-- [GopherJS](http://www.gopherjs.org/)
+- [GopherJS](https://github.com/gopherjs/gopherjs)
 - [GoReleaser](https://goreleaser.com)
 - [Helm](https://helm.sh)
 - [Hugo](https://gohugo.io)
 - [Infracost](https://github.com/infracost/infracost)
 - [Istio](https://istio.io)
 - [Kool](https://github.com/kool-dev/kool)
-- [Kubernetes](http://kubernetes.io/)
+- [Kubernetes](https://kubernetes.io/)
 - [Kubescape](https://github.com/armosec/kubescape)
 - [Linkerd](https://linkerd.io/)
 - [Mattermost-server](https://github.com/mattermost/mattermost-server)
@@ -39,7 +39,7 @@
 - [Pixie](https://github.com/pixie-io/pixie)
 - [Polygon Edge](https://github.com/0xPolygon/polygon-edge)
 - [Pouch](https://github.com/alibaba/pouch)
-- [ProjectAtomic (enterprise)](http://www.projectatomic.io/)
+- [ProjectAtomic (enterprise)](https://www.projectatomic.io/)
 - [Prototool](https://github.com/uber/prototool)
 - [QRcp](https://github.com/claudiodangelis/qrcp)
 - [Random](https://github.com/erdaltsksn/random)
diff --git a/user_guide.md b/user_guide.md
index 56a1e9c..cde4032 100644
--- a/user_guide.md
+++ b/user_guide.md
@@ -51,7 +51,7 @@
   Short: "Hugo is a very fast static site generator",
   Long: `A Fast and Flexible Static Site Generator built with
                 love by spf13 and friends in Go.
-                Complete documentation is available at http://hugo.spf13.com`,
+                Complete documentation is available at https://gohugo.io/documentation/`,
   Run: func(cmd *cobra.Command, args []string) {
     // Do Stuff Here
   },
@@ -429,7 +429,7 @@
 }
 ```
 
-For a more complete example of a larger application, please checkout [Hugo](http://gohugo.io/).
+For a more complete example of a larger application, please checkout [Hugo](https://gohugo.io/).
 
 ## Help Command
 
@@ -627,7 +627,7 @@
 Run 'hugo --help' for usage.
 ```
 
-Suggestions are automatic based on every subcommand registered and use an implementation of [Levenshtein distance](http://en.wikipedia.org/wiki/Levenshtein_distance). Every registered command that matches a minimum distance of 2 (ignoring case) will be displayed as a suggestion.
+Suggestions are automatic based on every subcommand registered and use an implementation of [Levenshtein distance](https://en.wikipedia.org/wiki/Levenshtein_distance). Every registered command that matches a minimum distance of 2 (ignoring case) will be displayed as a suggestion.
 
 If you need to disable suggestions or tweak the string distance in your command, use: