Update docker/metadata-action digest to c1e5197 (#981)

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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -66,7 +66,7 @@ jobs:
 
       - name: Generate Docker metadata (example-widget-mui)
         id: meta_example-widget-mui
-        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5
+        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5
         env:
           DOCKER_METADATA_PR_HEAD_SHA: true
         with:
@@ -190,7 +190,7 @@ jobs:
 
       - name: Generate Docker metadata
         id: meta
-        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5
+        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5
         with:
           images: ghcr.io/nordeck/matrix-widget-toolkit/widget-server
           labels: |