Bump sigstore/cosign-installer from 2.5.1 to 2.6.0 (#39)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@b3413d4...f3c664d)

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

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

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -26,7 +26,7 @@ jobs:
         check-latest: true
 
     - name: Install cosign
-      uses: sigstore/cosign-installer@b3413d484cc23cf8778c3d2aa361568d4eb54679 # v2.2.1
+      uses: sigstore/cosign-installer@f3c664df7af409cb4873aa5068053ba9d61a57b6 # v2.2.1
 
     - name: Install GoReleaser
       uses: goreleaser/goreleaser-action@ff11ca24a9b39f2d36796d1fbd7a4e39c182630a # v2.9.1