chore: add arm support

.github/workflows/docker.yml

@@ -79,6 +79,9 @@ jobs:
       - name: Checkout repository
         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
 
@@ -93,6 +96,7 @@ jobs:
         with:
           context: .
           file: Dockerfile
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: rivetgg/godot:${{ matrix.godot_version }}
           build-args: |