Merge pull request #1813 from Anselmoo/renovate/sigstore-cosign-installer-3.x

chore(deps): update sigstore/cosign-installer action to v3.8.0

Author: Anselmoo

.github/workflows/docker-cd.yml

@@ -36,7 +36,7 @@ jobs:
           fetch-depth: 1
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.7.0
+        uses: sigstore/cosign-installer@v3.8.0
         # with:
         #   cosign-release: 'v2.2.4' # optional