fix typo

Author: 3nids

src/native/qgsnative.h

@@ -136,7 +136,8 @@ class NATIVE_EXPORT QgsNative : public QObject
     virtual void setApplicationBadgeCount( int count );
 
     /**
-     * Returns true if the operating system is set to utilise a "dark" theme.
+     * Returns true if the operating system is set to utilize a "dark" theme.
+     * \since QGIS 3.4
      */
     virtual bool hasDarkTheme() {return false;}