chore: revert change

tests/client/test_streamable_http.py

@@ -25,7 +25,7 @@ def fastmcp_server():
 
     # Add a tool
     @server.tool
-    async def greet(name: str) -> str:
+    def greet(name: str) -> str:
         """Greet someone by name."""
         return f"Hello, {name}!"