chore: add changeset for workflow updates

This ensures the new workflows reach main branch through the proper release process

Author: Seungwoo321

.changeset/workflow-update.md

@@ -0,0 +1,12 @@
+---
+"vue-pivottable": patch
+---
+
+chore: implement new Git Flow workflow strategy
+
+- Add automated PR creation: develop → staging → main
+- Add tag-based production releases
+- Update release workflows for better automation
+- Fix YAML syntax and label issues in workflows
+
+This update changes the release process to use automated PRs and tag-based deployments.