Add docstring for Chat.set_photo and Chat.remove_photo

Author: MarcoBuster

botogram/objects/mixins.py

@@ -363,12 +363,14 @@ def delete_message(self, message):
 
     @_require_api
     def set_photo(self, path):
+        """Set a new chat photo"""
         args = {"chat_id": self.id}
         files = {"photo": open(path, "rb")}
         self._api.call("setChatPhoto", args, files)
 
     @_require_api
     def remove_photo(self):
+        """Remove the current chat photo"""
         args = {"chat_id": self.id}
         self._api.call("deleteChatPhoto", args)