Create GH releases on tag push, update deprecated workflow components

- main.yml: Trigger on tag pushes (noble-*, jammy-*) instead of manual
  release published events
- main.yml: Add step to create GitHub release after image build+push
- main.yml: Add contents:write + packages:write permissions
- main.yml: Update docker/build-push-action from v5 to v6
- scheduled-build.yml: Update docker/build-push-action from v5 to v6
- stale.yml: Remove deprecated repo-token parameter

Co-authored-by: samip5 <1703002+samip5@users.noreply.github.com>

.github/workflows/main.yml

@@ -2,12 +2,18 @@ name: Release
 
 on:
     workflow_dispatch:
-    release:
-     types: [published]
+    push:
+        tags:
+            - 'noble-*'
+            - 'jammy-*'
+
+permissions:
+    contents: write
+    packages: write
+
 jobs:
     build:
         runs-on: ubuntu-latest
-        if: "!contains(github.event.head_commit.message, '[ci-skip]')"
         steps:
           - name: Checkout
             uses: actions/checkout@v4
@@ -76,7 +82,7 @@ jobs:
                 password: ${{ secrets.DOCKER_PASSWORD }}
 
           - name: Build and Push
-            uses: docker/build-push-action@v5
+            uses: docker/build-push-action@v6
             with:
               builder: ${{ steps.buildx.outputs.name }}
               context: image
@@ -84,3 +90,13 @@ jobs:
               push: ${{ steps.prep.outputs.push }}
               tags: ${{ steps.prep.outputs.tags }}
               build-args: BASE_IMAGE=${{ steps.prep.outputs.base_image }}
+
+          - name: Create GitHub Release
+            if: startsWith(github.ref, 'refs/tags/')
+            run: |
+              gh release create "${{ github.ref_name }}" \
+                --repo "${{ github.repository }}" \
+                --title "${{ github.ref_name }}" \
+                --generate-notes
+            env:
+              GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}