chore(deps): update sigstore/cosign-installer action to v3.4.0

Author: renovate[bot]

.github/workflows/docker-publish.yaml

@@ -35,7 +35,7 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@v3.1.1
+        uses: sigstore/cosign-installer@v3.4.0
         with:
           cosign-release: 'v2.1.1'