Bump NUnit3TestAdapter from 4.3.0 to 4.3.1 (#6259)

Bumps [NUnit3TestAdapter](https://github.com/nunit/nunit3-vs-adapter) from 4.3.0 to 4.3.1.
- [Release notes](https://github.com/nunit/nunit3-vs-adapter/releases)
- [Commits](nunit/nunit3-vs-adapter@V4.3.0...V4.3.1)

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

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/core/Akka.Streams.Tests.TCK/Akka.Streams.Tests.TCK.csproj

@@ -19,7 +19,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.3.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.3.1" />
     <PackageReference Include="Reactive.Streams.TCK" Version="1.0.2" />
     <!-- !!!WARNING!!! 
          NUNIT VERSION HAVE TO MATCH WITH THE VERSION USED BY REACTIVE TCK.