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

Author: renovate[bot]

.github/workflows/docker-test.yml

@@ -135,7 +135,7 @@ jobs:
           persist-credentials: false
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
+        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4
 
       - name: Build server image
         run: |