refactor: Fix include guard end comment

src/swiftguistandard/swiftguistd.h

@@ -337,4 +337,4 @@ private:
     //! @}
 };
 
-#endif // guard
+#endif // STDGUI_SWIFTGUISTD_H

src/swiftguistandard/swiftguistdapplication.h

@@ -41,4 +41,4 @@ private:
                                          "coremode" }; //!< Facade startup mode
 };
 
-#endif // guard
+#endif // SWIFTGUISTDAPPLICATION_H