use v4

Author: tanmay-db

NEXT_CHANGELOG.md

@@ -14,5 +14,6 @@
 * Introduce automated tagging ([#409](https://github.com/databricks/databricks-sdk-java/pull/409)).
 * Update Jobs GetJob API to support paginated responses  ([#403](https://github.com/databricks/databricks-sdk-java/pull/403)).
 * Update Jobs GetRun API to support paginated responses  ([#402](https://github.com/databricks/databricks-sdk-java/pull/402)).
+* Update github cache action version from v2 to v4 ([#415](Update github cache action version from v2 to v4))
 
 ### API Changes