feat: add automated Docker BuildX dependency management workflow (#4029)

.github/workflows/docker-buildx-upgrade.yml

@@ -2,7 +2,7 @@ name: "Docker/Buildx Version Upgrade"
 
 on:
   schedule:
-    - cron: '0 0 * * 1'  # Run every Monday at midnight
+    - cron: "0 9 * * 1" # Weekly on Monday at 9 AM UTC (independent of other dependencies)
   workflow_dispatch: # Allow manual triggering
 
 jobs:
@@ -134,11 +134,30 @@ jobs:
           git commit -a -m "$commit_message"
           git push --force origin "$branch_name"
 
-          # Create PR
-          pr_body="Upgrades Docker version from ${{ needs.check-versions.outputs.DOCKER_CURRENT_VERSION }} to ${{ needs.check-versions.outputs.DOCKER_LATEST_VERSION }} and Docker Buildx version from ${{ needs.check-versions.outputs.BUILDX_CURRENT_VERSION }} to ${{ needs.check-versions.outputs.BUILDX_LATEST_VERSION }}.\n\n"
-          pr_body+="Release notes: https://docs.docker.com/engine/release-notes/\n\n"
-          pr_body+="---\n\nAutogenerated by [Docker/Buildx Version Upgrade Workflow](https://github.com/actions/runner/blob/main/.github/workflows/docker-buildx-upgrade.yml)"
+          # Create PR body using here-doc for proper formatting
+          cat > pr_body.txt << 'EOF'
+          Automated Docker and Buildx version update:
           
+          - Docker: ${{ needs.check-versions.outputs.DOCKER_CURRENT_VERSION }} → ${{ needs.check-versions.outputs.DOCKER_LATEST_VERSION }}
+          - Buildx: ${{ needs.check-versions.outputs.BUILDX_CURRENT_VERSION }} → ${{ needs.check-versions.outputs.BUILDX_LATEST_VERSION }}
+          
+          This update ensures we're using the latest stable Docker and Buildx versions for security and performance improvements.
+          
+          **Release notes:** https://docs.docker.com/engine/release-notes/
+          
+          **Next steps:**
+          - Review the version changes
+          - Verify container builds work as expected
+          - Test multi-platform builds if applicable
+          - Merge when ready
+          
+          ---
+          
+          Autogenerated by [Docker/Buildx Version Upgrade Workflow](https://github.com/actions/runner/blob/main/.github/workflows/docker-buildx-upgrade.yml)
+          EOF
+
+          # Create PR
           gh pr create -B main -H "$branch_name" \
             --title "$pr_title" \
-            --body "$pr_body"
+            --label "dependency" \
+            --body-file pr_body.txt