Bump NUnit3TestAdapter from 4.5.0 to 4.6.0

Bumps [NUnit3TestAdapter](https://github.com/nunit/nunit3-vs-adapter) from 4.5.0 to 4.6.0.
- [Release notes](https://github.com/nunit/nunit3-vs-adapter/releases)
- [Commits](nunit/nunit3-vs-adapter@V4.5.0...V4.6.0)

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

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

Sideways.Tests/Sideways.Tests.csproj

@@ -15,7 +15,7 @@
     <PackageReference Include="Microsoft.Data.Sqlite" Version="8.0.7" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageReference Include="NUnit" Version="3.14.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
   </ItemGroup>
 
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