build(deps): bump sigstore/cosign-installer from 3.7.0 to 3.8.0

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.7.0 to 3.8.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@dc72c7d...c56c2d3)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -32,7 +32,7 @@ jobs:
           ./apko version
 
       - name: Setup cosign (needed in CI tests)
-        uses: sigstore/cosign-installer@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da # v3.7.0
+        uses: sigstore/cosign-installer@c56c2d3e59e4281cc41dea2217323ba5694b171e # v3.8.0
 
       - name: Setup crane (needed in CI tests)
         uses: imjasonh/setup-crane@31b88efe9de28ae0ffa220711af4b60be9435f6e # v0.4

.github/workflows/release.yaml

@@ -29,7 +29,7 @@ jobs:
         go-version-file: 'go.mod'
         check-latest: true
 
-    - uses: sigstore/cosign-installer@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da # v3.7.0
+    - uses: sigstore/cosign-installer@c56c2d3e59e4281cc41dea2217323ba5694b171e # v3.8.0
 
     - uses: goreleaser/goreleaser-action@9ed2f89a662bf1735a48bc8557fd212fa902bebf # v2.8.1
       with: