Point SVGTransform.matrix to SVG 1.1 spec

Browsers did not implement the SVG 2 evolution.

Author: caugner

api/SVGTransform.json

@@ -90,7 +90,7 @@
       "matrix": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/SVGTransform/matrix",
-          "spec_url": "https://svgwg.org/svg2-draft/coords.html#__svg__SVGTransform__matrix",
+          "spec_url": "https://www.w3.org/TR/SVG11/coords.html#__svg__SVGTransform__matrix",
           "tags": [
             "web-features:svg"
           ],