chore(deps): update docker/setup-buildx-action action to v4

Author: renovate[bot]

.github/workflows/nightlyAndMainImage.yml

@@ -56,7 +56,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Download all artifacts from build job
         uses: actions/download-artifact@v7