Bump NUnit from 4.2.2 to 4.3.2

Bumps [NUnit](https://github.com/nunit/nunit) from 4.2.2 to 4.3.2.
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/main/CHANGES.md)
- [Commits](nunit/nunit@4.2.2...4.3.2)

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

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

Directory.Build.props

@@ -27,7 +27,7 @@
     <AkkaTestKitVersion>1.5.32</AkkaTestKitVersion>
     <MicrosoftNetTestSdkVersion>17.12.0</MicrosoftNetTestSdkVersion>
     <NUnit3Version>3.14.0</NUnit3Version>
-    <NUnit4Version>4.2.2</NUnit4Version>
+    <NUnit4Version>4.3.2</NUnit4Version>
     <NUnitAnalyzersVersion>4.4.0</NUnitAnalyzersVersion>
     <NUnitTestAdapterVersion>4.6.0</NUnitTestAdapterVersion>
   </PropertyGroup>