docs: fix command line args in Pub/Sub streaming sample (#5510)
docs: fix command line args in Pub/Sub streaming sample (#5510)


GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples