github: add weekly job to update bootc-image-builder ref

.github/workflows/update-bootc-image-builder.yml

@@ -0,0 +1,42 @@
+# This action updates the bootc-image-builder ref in the Schutzfile
+---
+name: "Update bootc-image-builder ref"
+
+on:
+  workflow_dispatch:
+  schedule:
+    # Every Sunday at 05:00
+    - cron: "0 5 * * 7"
+
+jobs:
+  update-and-push:
+    runs-on: ubuntu-latest
+
+  steps:
+    - name: Apt update
+      run: sudo apt update
+
+    - name: Install Dependencies
+      run: sudo apt install -y skopeo python3
+
+    - name: Update Schutzfile
+      run: ./test/scripts/update-schutzfile-bib
+
+    - name: Open PR
+      env:
+        GITHUB_TOKEN: ${{ secrets.SCHUTZBOT_GH_TOKEN }}
+      run: |
+        git config user.name "schutzbot"
+        git config user.email "[email protected]"
+        branch="schutzfile-bib-$(date -I)"
+        git checkout -b "${branch}"
+        git add Schutzfile
+        git commit -m "schutzfile: Update bootc-image-builder ref"
+        git push https://"$GITHUB_TOKEN"@github.com/schutzbot/images.git
+        echo "Updating bootc-image-builder test container ref to latest"
+        gh pr create \
+          -t "Update bootc-image-builder ref to latest" \
+          -F "body" \
+          --repo "osbuild/images" \
+          --base "main" \
+          --head "schutzbot:${branch}"