Bump NUnit from 4.2.0 to 4.2.1 in /src

Bumps [NUnit](https://github.com/nunit/nunit) from 4.2.0 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@4.2.0...4.2.1)

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

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

Author: dependabot[bot]

src/NServiceBus.Transport.RabbitMQ.AcceptanceTests/NServiceBus.Transport.RabbitMQ.AcceptanceTests.csproj

@@ -13,7 +13,7 @@
   <ItemGroup>
     <PackageReference Include="GitHubActionsTestLogger" Version="2.4.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
-    <PackageReference Include="NUnit" Version="4.2.0" />
+    <PackageReference Include="NUnit" Version="4.2.1" />
     <PackageReference Include="NUnit.Analyzers" Version="4.3.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
   </ItemGroup>

src/NServiceBus.Transport.RabbitMQ.CommandLine.Tests/NServiceBus.Transport.RabbitMQ.CommandLine.Tests.csproj

@@ -13,7 +13,7 @@
   <ItemGroup>
     <PackageReference Include="GitHubActionsTestLogger" Version="2.4.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
-    <PackageReference Include="NUnit" Version="4.2.0" />
+    <PackageReference Include="NUnit" Version="4.2.1" />
     <PackageReference Include="NUnit.Analyzers" Version="4.3.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
   </ItemGroup>

src/NServiceBus.Transport.RabbitMQ.Tests/NServiceBus.Transport.RabbitMQ.Tests.csproj

@@ -13,7 +13,7 @@
   <ItemGroup>
     <PackageReference Include="GitHubActionsTestLogger" Version="2.4.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
-    <PackageReference Include="NUnit" Version="4.2.0" />
+    <PackageReference Include="NUnit" Version="4.2.1" />
     <PackageReference Include="NUnit.Analyzers" Version="4.3.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
   </ItemGroup>

src/NServiceBus.Transport.RabbitMQ.TransportTests/NServiceBus.Transport.RabbitMQ.TransportTests.csproj

@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="GitHubActionsTestLogger" Version="2.4.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
-    <PackageReference Include="NUnit" Version="4.2.0" />
+    <PackageReference Include="NUnit" Version="4.2.1" />
     <PackageReference Include="NUnit.Analyzers" Version="4.3.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
   </ItemGroup>