Update docker/setup-buildx-action digest to f7ce87c (#277)

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

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -157,7 +157,7 @@ jobs:
       - name: Setup Docker buildx
         id: buildx
         timeout-minutes: 4
-        uses: docker/setup-buildx-action@ba31df4664624f17e1b1ef1c9c85ed1ca9463a6d
+        uses: docker/setup-buildx-action@f7ce87c1d6bead3e36075b2ce75da1f6cc28aaca
       - name: Log into registry
         timeout-minutes: 5
         uses: docker/login-action@327cd5a69de6c009b9ce71bce8395f28e651bf99