Update docker/setup-buildx-action digest to afeb29a (#375)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -48,7 +48,7 @@ jobs:
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2
+        uses: docker/setup-buildx-action@afeb29a6e0d7d6258844ecabe6eba67d13443680
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action