Update docker/setup-buildx-action action to v4

Author: renovate[bot]

.github/workflows/release.yml

@@ -20,7 +20,7 @@ jobs:
           platforms: all
       - name: Set up docker buildx
         id: buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
         with:
           version: latest
       - name: Login to docker registry

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
           platforms: all
       - name: Set up docker buildx
         id: buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
         with:
           version: latest
       - name: Run buildx