Tag releases via PR

.github/workflows/tag-release.yml

@@ -0,0 +1,25 @@
+name: tag-release
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - version.txt
+
+jobs:
+  tag:
+    if: ${{ github.repository == 'kubernetes/node-problem-detector' }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - run: /usr/bin/git config --global user.email actions@github.com
+      - run: /usr/bin/git config --global user.name 'GitHub Actions Release Tagger'
+      - run: hack/tag-release.sh
+        id: tag_release
+    outputs:
+      release_tag: ${{ steps.tag_release.outputs.release_tag }}