Bump NUnit.Analyzers from 4.5.0 to 4.6.0

Bumps [NUnit.Analyzers](https://github.com/nunit/nunit.analyzers) from 4.5.0 to 4.6.0.
- [Release notes](https://github.com/nunit/nunit.analyzers/releases)
- [Changelog](https://github.com/nunit/nunit.analyzers/blob/master/CHANGES.md)
- [Commits](nunit/nunit.analyzers@4.5.0...4.6.0)

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

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

Author: dependabot[bot]

Directory.Build.props

@@ -22,7 +22,7 @@
     <MicrosoftNetTestSdkVersion>17.12.0</MicrosoftNetTestSdkVersion>
     <NUnit3Version>3.14.0</NUnit3Version>
     <NUnit4Version>4.3.2</NUnit4Version>
-    <NUnitAnalyzersVersion>4.5.0</NUnitAnalyzersVersion>
+    <NUnitAnalyzersVersion>4.6.0</NUnitAnalyzersVersion>
     <NUnitTestAdapterVersion>4.6.0</NUnitTestAdapterVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">