Bump sigstore/cosign-installer from 3.8.2 to 3.9.0

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.8.2 to 3.9.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.8.2...v3.9.0)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-version: 3.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/dockerhub-latest-image.yml

@@ -42,7 +42,7 @@ jobs:
         with:
           go-version-file: go.mod
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.8.2
+        uses: sigstore/cosign-installer@v3.9.0
         with:
           cosign-release: 'v2.2.3'
       - name: install QEMU

.github/workflows/dockerhub-released-image.yml

@@ -42,7 +42,7 @@ jobs:
         with:
           go-version-file: go.mod
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.8.2
+        uses: sigstore/cosign-installer@v3.9.0
         with:
           cosign-release: 'v2.2.3'
       - name: install QEMU