Bump Microsoft.CodeAnalysis.CSharp from 4.7.0 to 5.0.0

---
updated-dependencies:
- dependency-name: Microsoft.CodeAnalysis.CSharp
  dependency-version: 5.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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="4.7.0">
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.0.0">
       <PrivateAssets>analyzers</PrivateAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.CodeQuality.Analyzers" Version="3.3.2">