chore(deps): update dependency nunit to v4

Author: renovate[bot]

Client.IntegrationTests/Client.IntegrationTests.csproj

@@ -9,7 +9,7 @@
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="NLog" Version="5.3.4" />
     <PackageReference Include="NLog.Extensions.Logging" Version="5.3.15" />
-    <PackageReference Include="nunit" Version="3.14.0" />
+    <PackageReference Include="nunit" Version="4.3.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="TestContainers" Version="3.8.0" />

Client.UnitTests/Client.UnitTests.csproj

@@ -20,7 +20,7 @@
   <ItemGroup>
     <PackageReference Include="NLog" Version="5.3.4" />
     <PackageReference Include="NLog.Extensions.Logging" Version="5.3.15" />
-    <PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="NUnit" Version="4.3.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Update="StyleCop.Analyzers" Version="1.1.118" />