feat: add arm64 platform to Docker image builds

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Soft-Serve

.github/workflows/release.yml

@@ -70,7 +70,7 @@ jobs:
         id: docker_build
         uses: docker/build-push-action@v4
         with:
-          platforms: linux/amd64
+          platforms: linux/amd64,linux/arm64
           push: true
           build-args: |
             GITOPS_VERSION=${{ github.ref_name }}