chore(deps): update sigstore/cosign-installer action to v4 (#344)

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

.github/workflows/docker-publish.yml

@@ -155,7 +155,7 @@ jobs:
 
       # Install the cosign tool
       - name: Install cosign
-        uses: sigstore/cosign-installer@v3
+        uses: sigstore/cosign-installer@v4.1.1
 
       # Set up Docker Buildx
       - name: Set up Docker Buildx