Bump Microsoft.CodeAnalysis.CSharp.Scripting in /tools/DevicesApiTester (#1463)

Bumps [Microsoft.CodeAnalysis.CSharp.Scripting](https://github.com/dotnet/roslyn) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/master/docs/Breaking%20API%20Changes.md)
- [Commits](https://github.com/dotnet/roslyn/compare/v3.8.0...v3.9.0)
Signed-off-by: Ndependabot[bot] <support@github.com>
Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tools/DevicesApiTester/DeviceApiTester.csproj

@@ -16,7 +16,7 @@
 
   <ItemGroup>
     <PackageReference Include="CommandLineParser" Version="2.8.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Scripting" Version="3.8.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Scripting" Version="3.9.0" />
     <ProjectReference Include="$(MainLibraryPath)System.Device.Gpio.csproj" />
   </ItemGroup>