docs: update c# landing links

Author: Whipstickgostop

streamerbot/3.api/3.csharp/0.index.md

@@ -26,4 +26,7 @@ description: Extend Streamer.bot and take full control with custom code actions.
   ::card{icon="i-mdi-code-braces-box" title="C# Classes" to="/api/csharp/classes"}
     Reference of all Streamer.bot C# classes
   ::
+  ::card{icon=mdi:code-braces-box title="C# Enums" to="/api/csharp/enums"}
+    Reference of all Streamer.bot C# enums
+  ::
 ::