Bump the testdependencies group with 2 updates

Bumps the testdependencies group with 2 updates: [nunit](https://github.com/nunit/nunit) and [NUnit3TestAdapter](https://github.com/nunit/nunit3-vs-adapter).


Updates `nunit` from 3.12.0 to 4.1.0
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/master/CHANGES.md)
- [Commits](nunit/nunit@v3.12...4.1.0)

Updates `NUnit3TestAdapter` from 3.15.1 to 4.5.0
- [Release notes](https://github.com/nunit/nunit3-vs-adapter/releases)
- [Commits](nunit/nunit3-vs-adapter@V3.15.1...V4.5.0)

---
updated-dependencies:
- dependency-name: nunit
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: testdependencies
- dependency-name: NUnit3TestAdapter
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: testdependencies
...

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

src/Dodo.DataMover.Tests/Dodo.DataMover.Tests.csproj

@@ -7,7 +7,7 @@
 
     <ItemGroup>
         <PackageReference Include="nunit" Version="3.12.0" />
-        <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
+        <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     </ItemGroup>