Update server.py

Author: barnuri

src/mcp/server/fastmcp/server.py

@@ -157,7 +157,7 @@ def run(self, transport: Literal["stdio", "sse"] = "stdio") -> None:
         if transport not in TRANSPORTS.__args__:  # type: ignore
             raise ValueError(f"Unknown transport: {transport}")
 
-        def run(): self._run(transport)
+        async def run(): await self._run(transport)
         anyio.run(run)
 
     async def _run(self, transport: Literal["stdio", "sse"]):