Add sphinx-last-updated-by-git extenstion.

Use post_checkout job

Author: Mariatta

.readthedocs.yml

@@ -13,8 +13,11 @@ build:
   tools:
     python: "3"
 
+  jobs:
+    post_checkout:
+      - git fetch --unshallow || true
+
   commands:
-    - git fetch --unshallow || true
     - asdf plugin add uv
     - asdf install uv latest
     - asdf global uv latest