Update entity-guide.mdx (#481)

Fixed code in Python OAuth2 Apps (Connect an account for an entity),
kindly review it and take actions.

docs/introduction/foundations/components/entity/entity-guide.mdx

@@ -43,7 +43,7 @@ except NoItemsFound as e:
     )
 
     # Poll until the connection is active
-    connected_account = request.wait_until_active(client=composio_client, timeout=100)
+    connected_account = request.wait_until_active(client=toolset.client, timeout=100)
 ```
 </CodeGroup>
 </Tab>
@@ -396,4 +396,4 @@ curl --request POST \
 </Tab>
 </Tabs>
 
-You can use the above pattern to make agents at a user level to perform tasks on their behalf.
+You can use the above pattern to make agents at a user level to perform tasks on their behalf.