fix: Color.toGamma and Color.toLinear listener error

Author: cptbtptpbcptdtptp

packages/math/src/Color.ts

@@ -294,7 +294,7 @@ export class Color implements IClone<Color>, ICopy<ColorLike, Color> {
     out._r = Color.gammaToLinearSpace(this._r);
     out._g = Color.gammaToLinearSpace(this._g);
     out._b = Color.gammaToLinearSpace(this._b);
-    this._onValueChanged && this._onValueChanged();
+    out._onValueChanged && out._onValueChanged();
     return out;
   }
 
@@ -307,7 +307,7 @@ export class Color implements IClone<Color>, ICopy<ColorLike, Color> {
     out._r = Color.linearToGammaSpace(this._r);
     out._g = Color.linearToGammaSpace(this._g);
     out._b = Color.linearToGammaSpace(this._b);
-    this._onValueChanged && this._onValueChanged();
+    out._onValueChanged && out._onValueChanged();
     return out;
   }