build(deps): bump sigstore/cosign-installer from 3.0.2 to 3.0.3

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.0.2 to 3.0.3.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](9e9de2292d...204a51a57a)

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

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

.github/workflows/release.yaml

@@ -32,7 +32,7 @@ jobs:
       - name: Setup Syft
         uses: anchore/sbom-action/download-syft@422cb34a0f8b599678c41b21163ea6088edb2624 # v0.14.1
       - name: Setup Cosign
-        uses: sigstore/cosign-installer@9e9de2292db7abb3f51b7f4808d98f0d347a8919 # v3.0.2
+        uses: sigstore/cosign-installer@204a51a57a74d190b284a0ce69b44bc37201f343 # v3.0.3
       - name: Setup Kustomize
         uses: fluxcd/pkg/actions/kustomize@main
       - name: Login to GitHub Container Registry
@@ -134,7 +134,7 @@ jobs:
           --path="./flux-system" \
           --source=${{ github.repositoryUrl }} \
           --revision="${{ github.ref_name }}@sha1:${{ github.sha }}"
-      - uses: sigstore/cosign-installer@9e9de2292db7abb3f51b7f4808d98f0d347a8919 # v3.0.2
+      - uses: sigstore/cosign-installer@204a51a57a74d190b284a0ce69b44bc37201f343 # v3.0.3
       - name: Sign manifests
         env:
           COSIGN_EXPERIMENTAL: 1