Rollout sequencing with custom stages is now available in Preview

## Feature Feature Rollout sequencing with custom stages is now available in Preview. This feature offers granular control over upgrading groups of clusters within a fleet, allowing you to progressively roll out GKE versions across environments. For more information see[About rollout sequencing with custom stages](https://docs.cloud.google.com/kubernetes-engine/docs/concepts/rollout-sequencing-custom-stages/about-rollout-sequencing).