Update docker/metadata-action digest to a60f0f6 (#501)

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

Author: renovate[bot]

.github/workflows/docker-ci.yml

@@ -44,7 +44,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@ed95091677497158a9ff38b314264cd965388d5e
+        uses: docker/metadata-action@a60f0f62b5c12316066c8db464bfb2faafd7907b
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 

.github/workflows/docker-publish.yml

@@ -55,7 +55,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@ed95091677497158a9ff38b314264cd965388d5e
+        uses: docker/metadata-action@a60f0f62b5c12316066c8db464bfb2faafd7907b
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}