build(deps): bump sigstore/cosign-installer from 3.8.0 to 3.8.1

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.8.0 to 3.8.1.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@c56c2d3...d7d6bc7)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/lib-publish.yaml

@@ -113,7 +113,7 @@ jobs:
           echo "image_sha=$(docker inspect --format='{{index .RepoDigests 0}}' ${{ inputs.registry }}/${{ matrix.image }}:${{ inputs.image_tag }})" >> $GITHUB_OUTPUT
       - name: Install cosign
         if: ${{ inputs.image_tag != 'devel' }}
-        uses: sigstore/cosign-installer@c56c2d3e59e4281cc41dea2217323ba5694b171e #v3.8.0
+        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a #v3.8.1
       - name: Keyless image sign
         if: ${{ inputs.image_tag != 'devel' }}
         run: |