Attempt lint fix, it didn't happen locally

Author: tconley1428

temporalio/contrib/openai_agents/_invoke_model_activity.py

@@ -160,7 +160,7 @@ def make_tool(tool: ToolInput) -> Tool:
                 raise UserError(f"Unknown tool type: {tool.name}")
 
         tools = [make_tool(x) for x in input.get("tools", [])]
-        handoffs = [
+        handoffs: list[Handoff[Any]] = [
             Handoff(
                 tool_name=x.tool_name,
                 tool_description=x.tool_description,