chore(deps): update unbounded-tech/workflow-vnext-tag action to v1.21.3

Author: renovate[bot]

.github/workflows/on-push-main.yaml

@@ -103,7 +103,7 @@ jobs:
       - validate
       - test
       - e2e
-    uses: unbounded-tech/workflow-vnext-tag/.github/workflows/workflow.yaml@v1.21.0
+    uses: unbounded-tech/workflow-vnext-tag/.github/workflows/workflow.yaml@v1.21.3
     secrets:
       DEPLOY_KEY: ${{ secrets.DEPLOY_KEY }}
     with: