chore: include contributing/ folder in autoformat.sh

Also formatted the files in that folder in this same commit.

PiperOrigin-RevId: 766885306

contributing/samples/human_in_loop/main.py

@@ -13,25 +13,23 @@
 # limitations under the License.
 
 import asyncio
+import os
+from typing import Any
+from typing import Union
 
 import agent
 from dotenv import load_dotenv
-from typing import Any
-from typing import Union
 from google.adk.agents import Agent
 from google.adk.events import Event
 from google.adk.runners import Runner
-from google.adk.tools import LongRunningFunctionTool
 from google.adk.sessions import InMemorySessionService
+from google.adk.tools import LongRunningFunctionTool
 from google.genai import types
-
-import os
 from opentelemetry import trace
 from opentelemetry.exporter.cloud_trace import CloudTraceSpanExporter
 from opentelemetry.sdk.trace import export
 from opentelemetry.sdk.trace import TracerProvider
 
-
 load_dotenv(override=True)
 
 APP_NAME = "human_in_the_loop"