docs: disable announcement bar for v38 (#31774)

tools/mkdocs/mkdocs.yml

@@ -59,7 +59,7 @@ theme:
   # The custom_dir points to the overrides folder, this folder has the code for our announcement bar.
   # The easiest way to disable the announcement bar is to comment out the custom_dir: overrides entry in this mkdocs.yml file.
   # https://squidfunk.github.io/mkdocs-material/customization/#setup-and-theme-structure
-  custom_dir: overrides
+  # custom_dir: overrides
 
   logo: 'assets/images/logo.png'
   favicon: 'assets/images/logo.png'