Bump examples/codelabs from ad31963 to 6ee198e (#11242)

Bumps [examples/codelabs](https://github.com/flutter/codelabs) from
`ad31963` to `6ee198e`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/flutter/codelabs/commit/6ee198e098488302fc67997f5f7797ecf281940b"><code>6ee198e</code></a>
Bump actions/checkout from 4.2.0 to 4.2.1 (<a
href="https://redirect.github.com/flutter/codelabs/issues/2247">#2247</a>)</li>
<li>See full diff in <a
href="https://github.com/flutter/codelabs/compare/ad31963f0396c7890032c25de72ac7711616a949...6ee198e098488302fc67997f5f7797ecf281940b">compare
view</a></li>
</ul>
</details>
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