[docs] Fixed stable symlink not updating when changed

Author: bmispelon

docs/management/commands/update_docs.py

@@ -369,7 +369,9 @@ def _setup_stable_symlink(self, release, built_dir):
         """
         stable = built_dir / "stable"
         target = built_dir / release.version
-        stable.symlink_to(target, target_is_directory=True)
+        if stable.resolve() != target:  # Symlink is either missing or has changed
+            stable.unlink(missing_ok=True)
+            stable.symlink_to(target, target_is_directory=True)
 
 
 def gen_decoded_documents(directory):