chore(deps): Bump WireMock.Net from 1.6.5 to 1.6.8 (#679)

Bumps [WireMock.Net](https://github.com/WireMock-Net/WireMock.Net) from 1.6.5 to 1.6.8.
- [Release notes](https://github.com/WireMock-Net/WireMock.Net/releases)
- [Changelog](https://github.com/WireMock-Net/WireMock.Net/blob/master/CHANGELOG.md)
- [Commits](https://github.com/WireMock-Net/WireMock.Net/commits)

---
updated-dependencies:
- dependency-name: WireMock.Net
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Client.Core.Test/Client.Core.Test.csproj

@@ -16,7 +16,7 @@
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
         <PackageReference Include="NUnit" Version="3.14.0" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
-        <PackageReference Include="WireMock.Net" Version="1.6.5" />
+        <PackageReference Include="WireMock.Net" Version="1.6.8" />
     </ItemGroup>
 
     <ItemGroup>