fix(flagd): reduce loglevel of expected logs (#277)

Signed-off-by: Simon Schrottner <[email protected]>

Author: aepfli

providers/openfeature-provider-flagd/src/openfeature/contrib/provider/flagd/resolvers/process/connector/grpc_watcher.py

@@ -258,7 +258,7 @@ def listen(self) -> None:
                         logger.debug("Terminating gRPC sync thread")
                         return
             except grpc.RpcError as e:  # noqa: PERF203
-                logger.error(f"SyncFlags stream error, {e.code()=} {e.details()=}")
+                logger.debug(f"SyncFlags stream error, {e.code()=} {e.details()=}")
             except json.JSONDecodeError:
                 logger.exception(
                     f"Could not parse JSON flag data from SyncFlags endpoint: {flag_str=}"