message: samples: fix sample name for openTelemetryTracing
  This was causing spurious synthtool updates.
diff: // title: OpenTelemetry Tracing
  // description: Demonstrates how to enable OpenTelemetry tracing in
  // a publisher or subscriber.
  -// usage: node opentelemetryTracing.js <topic-name> <subscription-name>
  +// usage: node openTelemetryTracing.js <topic-name> <subscription-name>
  const SUBSCRIBER_TIMEOUT = 10;
  