Update article.md

Maksumi Murakami · web-flow · commit bc92283021a5 · 2020-08-13T17:39:47.000-05:00
Changes proposes for the [issue 2049](javascript-tutorial#2049)
diff --git a/2-ui/1-document/11-coordinates/article.md b/2-ui/1-document/11-coordinates/article.md
@@ -88,8 +88,8 @@ As you can see, `left/top` do not equal `x/y` in such case.
 In practice though, `elem.getBoundingClientRect()` always returns positive width/height, here we mention negative `width/height` only for you to understand why these seemingly duplicate properties are not actually duplicates.
 ```
 
-```warn header="Internet Explorer and Edge: no support for `x/y`"
-Internet Explorer and Edge don't support `x/y` properties for historical reasons.
+```warn header="Internet Explorer: no support for `x/y`"
+Internet Explorer don't support `x/y` properties for historical reasons.
 
 So we can either make a polyfill (add getters in `DomRect.prototype`) or just use `top/left`, as they are always the same as `x/y` for positive `width/height`, in particular in the result of `elem.getBoundingClientRect()`.
 ```
