build(deps): bump the gh-actions group with 2 updates (#336)

Bumps the gh-actions group with 2 updates: [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) and [azure/setup-helm](https://github.com/azure/setup-helm).


Updates `sigstore/cosign-installer` from 3.8.0 to 3.8.1
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](c56c2d3e59...d7d6bc7722)

Updates `azure/setup-helm` from 4.2.0 to 4.3.0
- [Release notes](https://github.com/azure/setup-helm/releases)
- [Changelog](https://github.com/Azure/setup-helm/blob/main/CHANGELOG.md)
- [Commits](fe7b79cd5e...b9e51907a0)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gh-actions
- dependency-name: azure/setup-helm
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gh-actions
...

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

.github/workflows/deploy.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # ratchet:actions/checkout@v4
       - name: Install cosign
-        uses: sigstore/cosign-installer@c56c2d3e59e4281cc41dea2217323ba5694b171e # ratchet:sigstore/cosign-installer@main
+        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # ratchet:sigstore/cosign-installer@main
         with:
           cosign-release: 'v2.2.3'
       - name: Verify runner image
@@ -49,7 +49,7 @@ jobs:
           push: true
           push_ghcr: true
           workload_identity_provider: ${{ secrets.NAIS_IO_WORKLOAD_IDENTITY_PROVIDER }}
-      - uses: azure/setup-helm@fe7b79cd5ee1e45176fcad797de68ecaf3ca4814 # ratchet:azure/setup-helm@v4
+      - uses: azure/setup-helm@b9e51907a09c216f16ebe8536097933489208112 # ratchet:azure/setup-helm@v4
         name: 'Setup Helm'
         with:
           version: '3.13.2'