Update RGBShiftShader.js

examples/jsm/shaders/RGBShiftShader.js

@@ -1,8 +1,8 @@
 /**
  * RGB Shift Shader
  * Shifts red and blue channels from center in opposite directions
- * Ported from http://kriss.cx/tom/2009/05/rgb-shift/
- * by Tom Butterworth / http://kriss.cx/tom/
+ * Ported from https://web.archive.org/web/20090820185047/http://kriss.cx/tom/2009/05/rgb-shift/
+ * by Tom Butterworth / https://web.archive.org/web/20090810054752/http://kriss.cx/tom/
  *
  * amount: shift distance (1 is width of input)
  * angle: shift angle in radians