github: add release bot

.github/workflows/release-bot.yml

@@ -0,0 +1,20 @@
+name: Release Bot
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: nflaig/release-comment-on-pr@master
+        with:
+          token: ${{ secrets.RELEASE_BOT_TOKEN }}
+          message: |
+            Thank you everyone for the contribution!
+            This feature is now available in the latest release, [${releaseTag}](${releaseUrl}).
+            You can support LLDAP by starring our repo, contributing some configuration examples and becoming a sponsor.