Don't use matrix for different architectures

Author: birdhimself

.github/workflows/build-and-push.yml

@@ -14,7 +14,6 @@ jobs:
     strategy:
       matrix:
         folder: [proton]
-        arch: [amd64, arm64]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -32,7 +31,7 @@ jobs:
         run: |
           IMAGE=ghcr.io/${{ github.repository_owner }}/base-${{ matrix.folder }}
           docker buildx build \
-            --platform linux/${{ matrix.arch }} \
+            --platform linux/amd64,linux/arm64 \
             -f ${{ matrix.folder }}/Containerfile \
             -t $IMAGE:latest \
             --push ${{ matrix.folder }}