Bump docker/setup-buildx-action from 3.6.1 to 3.8.0

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 3.6.1 to 3.8.0.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@988b5a0...6524bf6)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -38,7 +38,7 @@ jobs:
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db
+        uses: docker/setup-buildx-action@6524bf65af31da8d45b59e8c27de4bd072b392f5
         with:
           install: true