CI: Auto build ISO when bumping Go version

.github/workflows/update-golang-version.yml

@@ -43,8 +43,18 @@ jobs:
           base: master
           delete-branch: true
           title: 'Update go from ${{ steps.bumpGolang.outputs.OLD_VERSION }} to ${{ steps.bumpGolang.outputs.NEW_VERSION }}'
-          labels: ok-to-test
           body: |
             Kubernetes Project just updated the [golang version](https://github.com/kubernetes/kubernetes/blob/master/build/build-image/cross/VERSION), updating minikube golang to match Kubernetes.
 
             This PR was auto-generated by `make update-golang-version` using [update-golang-version.yml](https://github.com/kubernetes/minikube/tree/master/.github/workflows/update-golang-version.yml) CI Workflow.
+      - uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea
+        if: ${{ steps.bumpGolang.outputs.changes != '' }}
+        with:
+          github-token: ${{ secrets.MINIKUBE_BOT_PAT }}
+          script: |
+            github.rest.issues.createComment({
+              issue_number: ${{ steps.createPR.outputs.pull-request-number }},
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'ok-to-build-iso'
+            })