add github release action

Signed-off-by: Ivan Valdes <[email protected]>

.github/workflows/release-update-website.yaml

@@ -0,0 +1,23 @@
+---
+name: Release
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  update_website:
+    name: Update website
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
+        with:
+          repository: ivanvc/etcd-website
+      - env:
+          RELEASE_TAG: ${{ github.release.tag_name }}
+        run: |
+          minor="$(echo $RELEASE_TAG | cut -d. -f1-2)"
+          sed -i 's/git_version_tag:\sv\([0-9]\+\.\)\{2\}[0-9]\+/git_version_tag: '$RELEASE_TAG'/' "content/en/docs/$minor/_index.md"
+          git add "content/en/docs/$minor/_index.md"
+          git -c user.name="$GITHUB_ACTOR" -c user.email="[email protected]" commit -m "[$minor] Update installation version to latest tag ($RELEASE_TAG)"
+          git push origin main