Fix linting

Author: franciszekjob

starknet_py/net/http_client.py

@@ -106,7 +106,7 @@ async def _warn_if_incompatible_rpc_version(self):
         if not self._is_spec_version_verified:
             payload = {
                 "jsonrpc": "2.0",
-                "method": f"starknet_specVersion",
+                "method": "starknet_specVersion",
                 "id": 0,
             }