Bump Fronter.NET from a13a760 to 7a51ed0 (#1548) #patch

Bumps
[Fronter.NET](https://github.com/ParadoxGameConverters/Fronter.NET) from
`a13a760` to `7a51ed0`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ParadoxGameConverters/Fronter.NET/commit/7a51ed021dcad1ef5afc2b328b5ee8cff2888207"><code>7a51ed0</code></a>
Change release string format for Sentry</li>
<li>See full diff in <a
href="https://github.com/ParadoxGameConverters/Fronter.NET/compare/a13a760219ba375441268b575dcf22fdd6727695...7a51ed021dcad1ef5afc2b328b5ee8cff2888207">compare
view</a></li>
</ul>
</details>
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