Bump Microsoft.CodeAnalysis.CSharp from 4.7.0 to 4.8.0

Bumps [Microsoft.CodeAnalysis.CSharp](https://github.com/dotnet/roslyn) from 4.7.0 to 4.8.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/main/docs/Breaking%20API%20Changes.md)
- [Commits](https://github.com/dotnet/roslyn/commits)

---
updated-dependencies:
- dependency-name: Microsoft.CodeAnalysis.CSharp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -18,7 +18,7 @@
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageVersion Include="Suave" Version="2.6.2" />
     <PackageVersion Include="System.Memory" Version="4.5.5" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.7.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
     <PackageVersion Include="NUnit" Version="3.14.0" />
     <PackageVersion Include="FsUnit" Version="5.6.0" />
     <PackageVersion Include="FSharp.Data" Version="6.3.0" />