Bump FSharp.Core and Argu

Bumps [FSharp.Core](https://github.com/dotnet/fsharp) and [Argu](https://github.com/fsprojects/Argu). These dependencies needed to be updated together.

Updates `FSharp.Core` from 8.0.401 to 6.0.0
- [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)

Updates `Argu` from 6.2.4 to 6.2.5
- [Release notes](https://github.com/fsprojects/Argu/releases)
- [Changelog](https://github.com/fsprojects/Argu/blob/master/RELEASE_NOTES.md)
- [Commits](fsprojects/Argu@6.2.4...6.2.5)

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

Signed-off-by: dependabot[bot] <[email protected]>

tests/Tests.YamlRunner/Tests.YamlRunner.fsproj

@@ -31,7 +31,7 @@
   <ItemGroup>
     <PackageReference Update="FSharp.Core" Version="8.0.401" />
 
-    <PackageReference Include="Argu" Version="6.2.4" />
+    <PackageReference Include="Argu" Version="6.2.5" />
     <PackageReference Include="FSharp.Data" Version="6.4.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="SemanticVersioning" Version="2.0.2" />