Bump Fantomas.Core and Fantomas.FCS

Bumps [Fantomas.Core](https://github.com/fsprojects/fantomas) and [Fantomas.FCS](https://github.com/fsprojects/fantomas). These dependencies needed to be updated together.

Updates `Fantomas.Core` from 5.1.5 to 6.3.3
- [Release notes](https://github.com/fsprojects/fantomas/releases)
- [Changelog](https://github.com/fsprojects/fantomas/blob/main/CHANGELOG.md)
- [Commits](fsprojects/fantomas@v5.1.5...v6.3.3)

Updates `Fantomas.FCS` from 5.1.5 to 6.3.3
- [Release notes](https://github.com/fsprojects/fantomas/releases)
- [Changelog](https://github.com/fsprojects/fantomas/blob/main/CHANGELOG.md)
- [Commits](fsprojects/fantomas@v5.1.5...v6.3.3)

---
updated-dependencies:
- dependency-name: Fantomas.Core
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: Fantomas.FCS
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

src/Exercism.TestRunner.FSharp/Exercism.TestRunner.FSharp.fsproj

@@ -20,8 +20,8 @@
 
   <ItemGroup>
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
-    <PackageReference Include="Fantomas.Core" Version="5.1.5" />
-    <PackageReference Include="Fantomas.FCS" Version="5.1.5" />
+    <PackageReference Include="Fantomas.Core" Version="6.3.3" />
+    <PackageReference Include="Fantomas.FCS" Version="6.3.3" />
     <PackageReference Include="Humanizer.Core" Version="2.14.1" />
     <PackageReference Include="FsUnit.xUnit" Version="5.3.0" />
     <PackageReference Update="FSharp.Core" Version="7.0.0" />