Merge pull request #152 from crossplane/renovate/docker-setup-buildx-action-4.x

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

Author: bobh66

.github/workflows/ci.yml

@@ -86,7 +86,7 @@ jobs:
           platforms: all
 
       - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
         with:
           version: ${{ env.DOCKER_BUILDX_VERSION }}
           install: true