Merge pull request #36 from patchlevel/renovate/docker-setup-buildx-action-4.x

Update docker/setup-buildx-action action to v4

Author: DavidBadura

.github/workflows/ci.yaml

@@ -43,7 +43,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Login to GitHub Container Registry
         if: ${{ github.ref_name == 'main' }}
@@ -125,7 +125,7 @@ jobs:
 
     steps:
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v4