Update docker/metadata-action action to v5.8.0

| datasource  | package                | from   | to     |
| ----------- | ---------------------- | ------ | ------ |
| github-tags | docker/metadata-action | v5.7.0 | v5.8.0 |


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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -114,7 +114,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
+        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5.8.0
         with:
           images: |
             name=nginx/nginx-prometheus-exporter,enable=${{ github.event_name != 'pull_request' }}