Bump Fronter.NET from 8326c74 to a53943d (#2789)

Bumps
[Fronter.NET](https://github.com/ParadoxGameConverters/Fronter.NET) from
`8326c74` to `a53943d`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/a53943d435969f7157a013731a97ab6f5276badf"><code>a53943d</code></a>
Bump Updater from <code>d2f6692</code> to <code>9e60a53</code> (<a
href="https://redirect.github.com/ParadoxGameConverters/Fronter.NET/issues/911">#911</a>)</li>
<li>See full diff in <a
href="https://github.com/ParadoxGameConverters/Fronter.NET/compare/8326c742f923f3dbdf2d81a39966be49d75b3f7c...a53943d435969f7157a013731a97ab6f5276badf">compare
view</a></li>
</ul>
</details>
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