🤖️ GH Actions (deps): Bump sigstore/cosign-installer from 2.6.0 to 3.…

…0.3 (#8)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 2.6.0 to 3.0.3.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@f3c664d...204a51a)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docker-publish.yml

@@ -36,7 +36,7 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@f3c664df7af409cb4873aa5068053ba9d61a57b6 #v2.6.0
+        uses: sigstore/cosign-installer@204a51a57a74d190b284a0ce69b44bc37201f343 #v3.0.3
         with:
           cosign-release: 'v1.13.1'