message: Fix region tag
diff: @@ -157,7 +157,7 @@ function updateSink (sinkName, filter) {
  }
  function deleteSink (sinkName) {
  - // [START logging_update_sink]
  + // [START logging_delete_sink]
  // Imports the Google Cloud client library
  const Logging = require('@google-cloud/logging');
  @@ -177,7 +177,7 @@ function deleteSink (sinkName) {
  .catch((err) => {
  console.error('ERROR:', err);
  });
  - // [END logging_update_sink]
  + // [END logging_delete_sink]
  }
  // The command-line program
  