zulip: Link bot_storage helpers to REST API docs.

Adds `# See https://zulip.com/api/...` references above the
update_storage and get_storage helpers.

Done in preparation for adding remove_storage, so all three
storage helpers carry the same reference.

Author: hanyucrocks

zulip/zulip/__init__.py

@@ -1633,6 +1633,7 @@ def create_user(self, request: Optional[Dict[str, Any]] = None) -> Dict[str, Any
             request=request,
         )
 
+    # See https://zulip.com/api/update-bot-storage
     def update_storage(self, request: Dict[str, Any]) -> Dict[str, Any]:
         """
         Example usage:
@@ -1647,6 +1648,7 @@ def update_storage(self, request: Dict[str, Any]) -> Dict[str, Any]:
             request=request,
         )
 
+    # See https://zulip.com/api/get-bot-storage
     def get_storage(self, request: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
         """
         Example usage: