Update sigstore/cosign-installer action to v3.4.0 (#14)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) | action | minor | `v3.3.0` -> `v3.4.0` |

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### Release Notes

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

### [`v3.4.0`](https://github.com/sigstore/cosign-installer/releases/tag/v3.4.0)

[Compare Source](sigstore/cosign-installer@v3.3.0...v3.4.0)

#### What's Changed

-   Use examples that work with multiple tags by [@&#8203;jkreileder](https://github.com/jkreileder) in sigstore/cosign-installer#155
-   default cosign install to release v2.2.3 by [@&#8203;cpanato](https://github.com/cpanato) in sigstore/cosign-installer#156

#### New Contributors

-   [@&#8203;jkreileder](https://github.com/jkreileder) made their first contribution in sigstore/cosign-installer#155

**Full Changelog**: sigstore/cosign-installer@v3...v3.4.0

</details>

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### Configuration

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🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

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 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: https://gitea.int.magicalinternetbox.net/joel/rhel-wireguard/pulls/14
Co-authored-by: Renovate Bot <renovatebot-gitea@talktojoel.me>
Co-committed-by: Renovate Bot <renovatebot-gitea@talktojoel.me>

.github/workflows/docker-publish.yml

@@ -41,7 +41,7 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@9614fae9e5c5eddabb09f90a270fcb487c9f7149 # v3.3.0
+        uses: sigstore/cosign-installer@e1523de7571e31dbe865fd2e80c5c7c23ae71eb4 # v3.4.0
         with:
           cosign-release: 'v2.1.1'