Update using-unreal-engine.mdx (#7556)

change client-> to Discord->Client-> so the sample works.

Author: mikecoker

docs/discord-social-sdk/getting-started/using-unreal-engine.mdx

@@ -256,7 +256,7 @@ Add this code to the `Ready` section of `OnStatusChanged`:
 ```cpp
   if (Status == EDiscordClientStatus::Ready) {
     UE_LOG(LogTemplateCharacter, Log, TEXT("Connected to Discord! Ready to go! You can now start using Discord features."));
-    UE_LOG(LogTemplateCharacter, Log, TEXT("👥 Friends Count: %d"), client->GetRelationships().Num());
+    UE_LOG(LogTemplateCharacter, Log, TEXT("👥 Friends Count: %d"), Discord->Client->GetRelationships().Num());
   }
 ```
 
@@ -295,7 +295,7 @@ Add this code to the `Ready` section of `OnStatusChanged`:
 ```cpp
   if (Status == EDiscordClientStatus::Ready) {
     UE_LOG(LogTemplateCharacter, Log, TEXT("Connected to Discord! Ready to go! You can now start using Discord features."));
-    UE_LOG(LogTemplateCharacter, Log, TEXT("👥 Friends Count: %d"), client->GetRelationships().Num());
+    UE_LOG(LogTemplateCharacter, Log, TEXT("👥 Friends Count: %d"), Discord->Client->GetRelationships().Num());
 
     UE_LOG(LogTemplateCharacter, Log, TEXT("Connected to Discord! Ready to go! You can now start using Discord features."));
     UDiscordActivity* Activity = NewObject<UDiscordActivity>();
@@ -717,4 +717,4 @@ You have successfully set up the Discord Social SDK with Unreal Engine and authe
 [`Client::Connect`]: https://discord.com/developers/docs/social-sdk/classdiscordpp_1_1Client.html#a873a844c7c4c72e9e693419bb3e290aa
 [`Client::GetRelationships`]: https://discord.com/developers/docs/social-sdk/classdiscordpp_1_1Client.html#ad481849835cd570f0e03adafcf90125d
 [`Client::UpdateToken`]: https://discord.com/developers/docs/social-sdk/classdiscordpp_1_1Client.html#a606b32cef7796f7fb91c2497bc31afc4
-[`RunCallbacks`]: https://discord.com/developers/docs/social-sdk/namespacediscordpp.html#ab5dd8cf274f581ee1885de5816be3c29
+[`RunCallbacks`]: https://discord.com/developers/docs/social-sdk/namespacediscordpp.html#ab5dd8cf274f581ee1885de5816be3c29