Bump DnsClient from 1.7.0 to 1.8.0 in /InternetTest

Bumps [DnsClient](https://github.com/MichaCo/DnsClient.NET) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/MichaCo/DnsClient.NET/releases)
- [Commits](MichaCo/DnsClient.NET@1.7.0...1.8.0)

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

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

InternetTest/InternetTest/InternetTest.csproj

@@ -36,7 +36,7 @@
 	</ItemGroup>
 
 	<ItemGroup>
-	  <PackageReference Include="DnsClient" Version="1.7.0" />
+	  <PackageReference Include="DnsClient" Version="1.8.0" />
 	  <PackageReference Include="ManagedNativeWifi" Version="2.5.0" />
 	  <PackageReference Include="PeyrSharp.Core" Version="2.1.0.2312" />
 	  <PackageReference Include="PeyrSharp.Env" Version="2.1.0.2312" />