Fix RangeSlider constructor reference to `[value]` (#111694)

packages/flutter/lib/src/material/range_slider.dart

@@ -110,7 +110,7 @@ class RangeSlider extends StatefulWidget {
   /// The range slider widget itself does not maintain any state. Instead, when
   /// the state of the slider changes, the widget calls the [onChanged] callback.
   /// Most widgets that use a range slider will listen for the [onChanged] callback
-  /// and rebuild the slider with a new [value] to update the visual appearance of
+  /// and rebuild the slider with new [values] to update the visual appearance of
   /// the slider. To know when the value starts to change, or when it is done
   /// changing, set the optional callbacks [onChangeStart] and/or [onChangeEnd].
   ///