fix bot lint issue

Author: mwri

src/a2a/client/card_resolver.py

@@ -74,7 +74,9 @@ async def get_agent_card(
         else:
             path_segment = relative_card_path.lstrip('/')
 
-        target_url = f'{self.base_url}/{path_segment}' if path_segment else self.base_url
+        target_url = (
+            f'{self.base_url}/{path_segment}' if path_segment else self.base_url
+        )
 
         try:
             response = await self.httpx_client.get(