Bump Verify.Nunit from 22.5.0 to 22.6.0 in /src (#784)

Bumps [Verify.Nunit](https://github.com/VerifyTests/Verify) from 22.5.0 to 22.6.0.
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](https://github.com/VerifyTests/Verify/commits/22.6.0)

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

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

Author: dependabot[bot]

Diff for: src/Tests/Tests.csproj

@@ -7,7 +7,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" />
     <PackageReference Include="Xunit" Version="2.6.2" />
-    <PackageReference Include="Verify.Nunit" Version="22.5.0" />
+    <PackageReference Include="Verify.Nunit" Version="22.6.0" />
     <ProjectReference Include="..\TextCopy\TextCopy.csproj" />
     <PackageReference Include="ProjectDefaults" Version="1.0.102" PrivateAssets="all" />
   </ItemGroup>