[lldb][NFC] Fix doxygen comment on top of GetMangledTypeName

Author: augusto2112

lldb/include/lldb/Symbol/TypeSystem.h

@@ -237,8 +237,8 @@ class TypeSystem : public PluginInterface,
 
   virtual ConstString GetDisplayTypeName(lldb::opaque_compiler_type_t type) = 0;
 
-  // Defaults to GetTypeName(type).  Override if your language desires
-  // specialized behavior.
+  /// Defaults to GetTypeName(type).  Override if your language desires
+  /// specialized behavior.
   virtual ConstString GetMangledTypeName(lldb::opaque_compiler_type_t type);
 
   virtual uint32_t