Build(deps): Bump Microsoft.CodeAnalysis.CSharp from 4.6.0 to 4.7.0

Bumps [Microsoft.CodeAnalysis.CSharp](https://github.com/dotnet/roslyn) from 4.6.0 to 4.7.0.
- [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] <[email protected]>

Author: dependabot[bot]

src/pr-dash.csproj

@@ -21,7 +21,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="7.0.1">
       <PrivateAssets>analyzers</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.6.0">
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.7.0">
       <PrivateAssets>analyzers</PrivateAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.CodeQuality.Analyzers" Version="3.3.2">