send vm update error to user

src/grpc.rs

@@ -163,9 +163,8 @@ impl BrainCli for BrainCliMock {
                 Ok(Response::new(response))
             }
             Err(e) => {
-                log::error!("Something weird happened. Reached error {e:?}");
                 Err(Status::unknown(
-                    "Request failed due to unknown error. Please try again or contact the DeTEE devs team.",
+                    "Update VM request failed due to error: {e}",
                 ))
             }
         }