build: Update to header 1.3.209

- Update known-good
- Generate source
diff --git a/loader/generated/loader_generated_header_version.cmake b/loader/generated/loader_generated_header_version.cmake
index 267200a..acf66d1 100644
--- a/loader/generated/loader_generated_header_version.cmake
+++ b/loader/generated/loader_generated_header_version.cmake
@@ -24,5 +24,5 @@
 #
 ############################################################################
 
-set(LOADER_GENERATED_HEADER_VERSION "1.3.208")
+set(LOADER_GENERATED_HEADER_VERSION "1.3.209")
 
diff --git a/scripts/known_good.json b/scripts/known_good.json
index 948b8ba..2a9340b 100644
--- a/scripts/known_good.json
+++ b/scripts/known_good.json
@@ -6,7 +6,7 @@
             "sub_dir": "Vulkan-Headers",
             "build_dir": "Vulkan-Headers/build",
             "install_dir": "Vulkan-Headers/build/install",
-            "commit": "v1.3.208"
+            "commit": "v1.3.209"
         },
         {
             "name": "googletest",