Update sigstore/cosign-installer digest to 3454372 (#382)

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

Author: renovate[bot]

Diff for: .github/workflows/docker-publish.yml

@@ -41,7 +41,7 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@b6ee8f83b9a8b8ef7f46b5a8ff326f488b386693
+        uses: sigstore/cosign-installer@3454372f43399081ed03b604cb2d021dabca52bb
         with:
           cosign-release: 'v1.9.0'