docs: fix ext.bridge menu behavior (#2566)

change data to autoclass

Author: yoggys

docs/ext/bridge/api.rst

@@ -154,7 +154,7 @@ BridgeContext Subclasses
 
 .. attributetable:: discord.ext.bridge.Context
 
-.. data:: discord.ext.bridge.Context
+.. autoclass:: discord.ext.bridge.Context
 
     Alias of :data:`typing.Union` [ :class:`.BridgeExtContext`, :class:`.BridgeApplicationContext` ] for typing convenience.