Bump Fronter.NET from fa280e1 to 5c9355d (#2829)

Bumps
[Fronter.NET](https://github.com/ParadoxGameConverters/Fronter.NET) from
`fa280e1` to `5c9355d`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/5c9355d694efc6525b589d5dc45e09df52f7036b"><code>5c9355d</code></a>
Bump Updater from <code>71798d7</code> to <code>602a2c6</code> (<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/918">#918</a>)</li>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/c54750c47a087251fba1ae68b66608ebce445a4e"><code>c54750c</code></a>
Bump actions/checkout from 5 to 6 (<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/919">#919</a>)</li>
<li>See full diff in <a
href="https://github.com/ParadoxGameConverters/Fronter.NET/compare/fa280e1810c25473d55f42fcfd7965f5dd382821...5c9355d694efc6525b589d5dc45e09df52f7036b">compare
view</a></li>
</ul>
</details>
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