Merge pull request #6613 from miketheman/add-socks-label

docs: add label to socks heading
diff --git a/docs/user/advanced.rst b/docs/user/advanced.rst
index 5e5e36f..ecd17cb 100644
--- a/docs/user/advanced.rst
+++ b/docs/user/advanced.rst
@@ -666,6 +666,8 @@
     >>> import requests
     >>> requests.get('https://example.org')
 
+.. _socks:
+
 SOCKS
 ^^^^^