fix: multi platform builds

Author: JonasHiltl

.github/workflows/publish-ghcr.yaml

@@ -32,6 +32,12 @@ jobs:
       - name: Check out the repo
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Log in to the Container registry
         uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
         with:
@@ -50,7 +56,7 @@ jobs:
 
       - name: Build and push Docker image
         id: push
-        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        uses: docker/build-push-action@v6
         with:
           file: ${{ matrix.dockerfile }}
           context: .