Bump FSharp.Core from 8.0.200 to 8.0.400 (#155)

Bumps [FSharp.Core](https://github.com/dotnet/fsharp) from 8.0.200 to 8.0.400.
- [Release notes](https://github.com/dotnet/fsharp/releases)
- [Changelog](https://github.com/dotnet/fsharp/blob/main/release-notes.md)
- [Commits](https://github.com/dotnet/fsharp/commits)

---
updated-dependencies:
- dependency-name: FSharp.Core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Exercism.Representers.FSharp/Exercism.Representers.FSharp.fsproj

@@ -12,7 +12,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Update="FSharp.Core" Version="8.0.200" />
+        <PackageReference Update="FSharp.Core" Version="8.0.400" />
         <PackageReference Include="CommandLineParser" Version="2.9.1" />
         <PackageReference Include="Fantomas.Core" Version="6.2.3" />
         <PackageReference Include="Fantomas.FCS" Version="6.2.3" />