build(deps): bump sigstore/cosign-installer

Bumps the production-dependencies group with 1 update in the / directory: [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer).


Updates `sigstore/cosign-installer` from 3.5.0 to 3.7.0
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.5.0...v3.7.0)

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

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

.github/workflows/image-build.yaml

@@ -174,7 +174,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install cosign
-        uses: sigstore/cosign-installer@v3.5.0
+        uses: sigstore/cosign-installer@v3.7.0
 
       - name: Login to quay.io/bpfman
         uses: redhat-actions/podman-login@v1
@@ -568,7 +568,7 @@ jobs:
           go-version: '1.22' # yamllint disable-line rule:quoted-strings
 
       - name: Install cosign
-        uses: sigstore/cosign-installer@v3.5.0
+        uses: sigstore/cosign-installer@v3.7.0
 
       - name: Checkout libbpf
         uses: actions/checkout@v4