Fix documentation for filterQuality fields (#104056)

packages/flutter/lib/src/painting/decoration_image.dart

@@ -154,9 +154,8 @@ class DecorationImage {
 
   /// Used to set the filterQuality of the image.
   ///
-  /// Use the "low" quality setting to scale the image, which corresponds to
-  /// bilinear interpolation, rather than the default "none" which corresponds
-  /// to nearest-neighbor.
+  /// Defaults to [FilterQuality.low] to scale the image, which corresponds to
+  /// bilinear interpolation.
   final FilterQuality filterQuality;
 
   /// Whether the colors of the image are inverted when drawn.

packages/flutter/lib/src/widgets/basic.dart

@@ -5702,9 +5702,8 @@ class RawImage extends LeafRenderObjectWidget {
 
   /// Used to set the filterQuality of the image.
   ///
-  /// Use the "low" quality setting to scale the image, which corresponds to
-  /// bilinear interpolation, rather than the default "none" which corresponds
-  /// to nearest-neighbor.
+  /// Defaults to [FilterQuality.low] to scale the image, which corresponds to
+  /// bilinear interpolation.
   final FilterQuality filterQuality;
 
   /// Used to combine [color] with this image.