Update docker/setup-buildx-action digest to d70bba7 (#33)

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

Author: renovate[bot]

.github/workflows/docker.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@2b51285047da1547ffb1b2203d8be4c0af6b1f20 # v3
+        uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action