fix: Append ModDescription not override it (#716)

Append ModDescription not override it

Author: SlejmUr

EXILED/Exiled.Loader/Loader.cs

@@ -511,7 +511,7 @@ public IEnumerator<float> Run(Assembly[] dependencies = null)
 
             EnablePlugins();
 
-            BuildInfoCommand.ModDescription = string.Join(
+            BuildInfoCommand.ModDescription += string.Join(
                 "\n",
                 AppDomain.CurrentDomain.GetAssemblies()
                     .Where(a => a.FullName.StartsWith("Exiled.", StringComparison.OrdinalIgnoreCase))