chore(deps): bump sigstore/cosign-installer from 3.3.0 to 3.4.0 (#13)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.3.0 to 3.4.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.3.0...v3.4.0)

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

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

action.yml

@@ -25,7 +25,7 @@ runs:
     # clones user's repo
     - uses: actions/checkout@v4
 
-    - uses: sigstore/cosign-installer@v3.3.0
+    - uses: sigstore/cosign-installer@v3.4.0
 
     # pull self-contained binary program from installer image (outputs a bash install script)
     - name: Install BlueBuild tool