fix: trailing spaces in markdown

website/docs/topics/groupchat/using_custom_models.md

@@ -1,7 +1,7 @@
 # Using Custom Models
 
 When using `GroupChatManager` we need to pass a `GroupChat` object in the constructor, a dataclass responsible for
-gathering agents, preparing messages from prompt templates and selecting speakers 
+gathering agents, preparing messages from prompt templates and selecting speakers
 (eventually using `speaker_selection_method` as described [here](customized_speaker_selection)).
 
 To do so GroupChat internally initializes two instances of ConversableAgent.
@@ -53,7 +53,7 @@ Note that the agents definition illustrated here is minimal and might not suit y
 basic setup for a group chat scenario.
 
 We then create a `GroupChat` and, if we want the underlying agents used by GroupChat to use our
-custom client, we will pass it in the `model_client_cls` attribute. 
+custom client, we will pass it in the `model_client_cls` attribute.
 
 Finally we create an instance of `GroupChatManager` and pass the config to it. This same config will be forwarded to
 the GroupChat, that (if needed) will automatically handle registration of custom models only.