fix: grammar

Author: totalimmersion

stream_chat/base/channel.py

@@ -444,23 +444,23 @@ def unmute(self, user_id: str) -> Union[StreamResponse, Awaitable[StreamResponse
     def pin(self, user_id: str) -> Union[StreamResponse, Awaitable[StreamResponse]]:
         """
         Pins a channel
-        Allows a user to pin the channel (only for theirselves)
+        Allows a user to pin the channel (only for themselves)
         """
         pass
 
     @abc.abstractmethod
     def unpin(self, user_id: str) -> Union[StreamResponse, Awaitable[StreamResponse]]:
         """
         Unpins a channel
-        Allows a user to unpin the channel (only for theirselves)
+        Allows a user to unpin the channel (only for themselves)
         """
         pass
 
     @abc.abstractmethod
     def archive(self, user_id: str) -> Union[StreamResponse, Awaitable[StreamResponse]]:
         """
         Pins a channel
-        Allows a user to archive the channel (only for theirselves)
+        Allows a user to archive the channel (only for themselves)
         """
         pass
 
@@ -470,7 +470,7 @@ def unarchive(
     ) -> Union[StreamResponse, Awaitable[StreamResponse]]:
         """
         Unpins a channel
-        Allows a user to unpin the channel (only for theirselves)
+        Allows a user to unpin the channel (only for themselves)
         """
         pass