Bump Microsoft.CodeAnalysis.Workspaces.MSBuild from 4.4.0 to 4.8.0

Bumps [Microsoft.CodeAnalysis.Workspaces.MSBuild](https://github.com/dotnet/roslyn) from 4.4.0 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.Workspaces.MSBuild
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/Tapper.Generator/Tapper.Generator.csproj

@@ -27,7 +27,7 @@
         <PackageReference Include="Microsoft.Build.Locator" Version="1.6.10" />
         <PackageReference Include="ConsoleAppFramework" Version="4.2.4" />
         <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.4.0" />
-        <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.4.0" />
+        <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.8.0" />
     </ItemGroup>
 
     <ItemGroup>

tests/Tapper.Tests/Tapper.Tests.csproj

@@ -10,7 +10,7 @@
         <PackageReference Include="Microsoft.Build" Version="17.8.3" ExcludeAssets="runtime" />
         <PackageReference Include="Microsoft.Build.Locator" Version="1.6.10" />
         <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.4.0" />
-        <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.4.0" />
+        <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.8.0" />
     </ItemGroup>
 
     <ItemGroup>