Bump NUnit from 4.0.1 to 4.2.1

Bumps [NUnit](https://github.com/nunit/nunit) from 4.0.1 to 4.2.1.
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/main/CHANGES.md)
- [Commits](nunit/nunit@v4.0.1...4.2.1)

---
updated-dependencies:
- dependency-name: NUnit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

osu.Game.Rulesets.Rush.Tests/osu.Game.Rulesets.Rush.Tests.csproj

@@ -1,28 +1,28 @@
-<Project Sdk="Microsoft.NET.Sdk">
-  <PropertyGroup>
-    <StartupObject>osu.Game.Rulesets.Rush.Tests.VisualTestRunner</StartupObject>
-    <Configurations>Debug;Release;Development</Configurations>
-    <Platforms>AnyCPU</Platforms>
-  </PropertyGroup>
-  <ItemGroup Label="Service">
-    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
-  </ItemGroup>
-  <PropertyGroup>
-    <GenerateProgramFile>false</GenerateProgramFile>
-  </PropertyGroup>
-  <ItemGroup Label="Package References">
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
-    <PackageReference Include="NUnit" Version="4.0.1" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-  </ItemGroup>
-  <PropertyGroup Label="Project">
-    <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)' == 'Development' ">
-    <Optimize Condition=" '$(Optimize)' == '' ">true</Optimize>
-  </PropertyGroup>
-  <ItemGroup Label="Project References">
-    <ProjectReference Include="..\osu.Game.Rulesets.Rush\osu.Game.Rulesets.Rush.csproj" />
-  </ItemGroup>
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <StartupObject>osu.Game.Rulesets.Rush.Tests.VisualTestRunner</StartupObject>
+    <Configurations>Debug;Release;Development</Configurations>
+    <Platforms>AnyCPU</Platforms>
+  </PropertyGroup>
+  <ItemGroup Label="Service">
+    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
+  </ItemGroup>
+  <PropertyGroup>
+    <GenerateProgramFile>false</GenerateProgramFile>
+  </PropertyGroup>
+  <ItemGroup Label="Package References">
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
+    <PackageReference Include="NUnit" Version="4.2.1" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
+  </ItemGroup>
+  <PropertyGroup Label="Project">
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)' == 'Development' ">
+    <Optimize Condition=" '$(Optimize)' == '' ">true</Optimize>
+  </PropertyGroup>
+  <ItemGroup Label="Project References">
+    <ProjectReference Include="..\osu.Game.Rulesets.Rush\osu.Game.Rulesets.Rush.csproj" />
+  </ItemGroup>
+</Project>