chore(deps): update sigstore/cosign-installer action to v3.8.1 (#306)

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

Author: renovate[bot]

.github/workflows/reusable-build.yml

@@ -383,7 +383,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       # Sign container
-      - uses: sigstore/[email protected].0
+      - uses: sigstore/[email protected].1
         if: github.event_name != 'pull_request'
 
       - name: Sign container image