Bump Microsoft.NETFramework.ReferenceAssemblies and xunit.runner.visualstudio

Bumps [Microsoft.NETFramework.ReferenceAssemblies](https://github.com/Microsoft/dotnet) and [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit). These dependencies needed to be updated together.

Updates `Microsoft.NETFramework.ReferenceAssemblies` from 1.0.3 to 1.0.3
- [Commits](https://github.com/Microsoft/dotnet/commits)

Updates `xunit.runner.visualstudio` from 3.0.2 to 3.1.0
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@3.0.2...3.1.0)

---
updated-dependencies:
- dependency-name: Microsoft.NETFramework.ReferenceAssemblies
  dependency-version: 1.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: xunit.runner.visualstudio
  dependency-version: 3.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
     <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.556" />
     <PackageVersion Include="xunit.v3" Version="2.0.1" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="3.0.2" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.0" />
     <!-- After an upgrade of these libraries the nuspec file should also be updated -->
     <PackageVersion Include="Avalonia" Version="11.2.8" />
     <PackageVersion Include="System.Drawing.Common" Version="8.0.14" />