style(mkdocs.yaml): disable navigation auto-expand

Signed-off-by: Mete Fatih Cırıt <mfc@autoware.org>

Author: xmfcx

mkdocs.yaml

@@ -8,7 +8,7 @@ copyright: Copyright © 2023 The Autoware Foundation
 theme:
   name: material
   features:
-    - navigation.expand
+    #    - navigation.expand # Until we simplify the navigation
     - navigation.indexes
     - navigation.instant
     - navigation.instant.prefetch