chore(deps): update dependency nunit3testadapter to v6

Author: renovate[bot]

src/SqlInliner.Tests/SqlInliner.Tests.csproj

@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="NUnit" Version="3.14.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="6.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageReference Include="Shouldly" Version="4.3.0" />
     <PackageReference Include="System.Formats.Asn1" Version="10.0.1" />