Revise input-color-alpha name an description

Author: ddbeck

features/input-color-alpha.yml

@@ -1,5 +1,6 @@
-name: "`alpha` and `colorspace` attributes for `<input type=color>`"
-description: The ability to control the opacity of a color picked using `<input type="color">` and determine the colorspace of the selected color.
+name: >
+  alpha and colorspace attributes for <input type="color">
+description: The `alpha` and `colorspace` attributes for the `<input type="color">` HTML element are hints to the browser to show controls for transparency or to limit color selection to a color space.
 spec: https://html.spec.whatwg.org/multipage/input.html#attr-input-alpha
 group:
   - forms