[web-animations-2][editorial] link fix

Author: svgeesus

web-animations-2/Overview.bs

@@ -2061,7 +2061,7 @@ anything that is accessible via script, including even producing audio
 or creating vibrations.
 
 For example, using a <a>custom effect</a> that draws to a <a
-href="https://www.w3.org/TR/html5/scripting-1.html#the-canvas-element"><code>canvas</code></a>
+href="https://www.w3.org/TR/2dcontext/"><code>canvas</code></a>
 element, it is possible to produce a complex animated effect
 featuring patterns that may be difficult to create using CSS or
 SVG.