Bump NUnit3TestAdapter from 5.2.0 to 6.0.0

---
updated-dependencies:
- dependency-name: NUnit3TestAdapter
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

api/tests/tests.csproj

@@ -39,7 +39,7 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="NUnit" Version="4.3.2" />
-    <PackageReference Include="NUnit3TestAdapter" Version="5.2.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>