chore(deps): update sigstore/cosign-installer action to v3.1.2 (#9)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[sigstore/cosign-installer](https://togithub.com/sigstore/cosign-installer)
| action | patch | `v3.1.1` -> `v3.1.2` |

---

### Release Notes

<details>
<summary>sigstore/cosign-installer (sigstore/cosign-installer)</summary>

###
[`v3.1.2`](https://togithub.com/sigstore/cosign-installer/releases/tag/v3.1.2)

[Compare
Source](https://togithub.com/sigstore/cosign-installer/compare/v3.1.1...v3.1.2)

##### What's Changed

- Fix build and push step Readme missing id by
[@&#8203;hbenali](https://togithub.com/hbenali) in
[https://github.com/sigstore/cosign-installer/pull/138](https://togithub.com/sigstore/cosign-installer/pull/138)
- bump cosign to v2.2.0 by
[@&#8203;cpanato](https://togithub.com/cpanato) in
[https://github.com/sigstore/cosign-installer/pull/142](https://togithub.com/sigstore/cosign-installer/pull/142)

##### New Contributors

- [@&#8203;hbenali](https://togithub.com/hbenali) made their first
contribution in
[https://github.com/sigstore/cosign-installer/pull/138](https://togithub.com/sigstore/cosign-installer/pull/138)

**Full Changelog**:
sigstore/cosign-installer@v3...v3.1.2

</details>

---

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---

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.github/workflows/build.yml

@@ -167,7 +167,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       # Sign container
-      - uses: sigstore/cosign-installer@v3.1.1
+      - uses: sigstore/cosign-installer@v3.1.2
         if: github.event_name != 'pull_request' && github.ref == 'refs/heads/live'
       - name: Sign container image
         if: github.event_name != 'pull_request' && github.ref == 'refs/heads/live'