chore: replace decimals with ratios in icons

Author: nikhedonia

packages/icons/icons/twitter.js

@@ -3,7 +3,7 @@ import { colours } from "@times-components/styleguide";
 import Svg, { Path } from "svgs";
 import iconPropTypes from "./proptypes";
 
-const ratio = 750 / 600;
+const ratio = 75 / 60;
 const IconTwitter = ({ width, height, fillColour }) => (
   <Svg
     width={width || height * ratio}

packages/icons/icons/video.js

@@ -6,7 +6,7 @@ import iconPropTypes from "./proptypes";
 const viewBox =
   "0.15463916957378387 0.049614034593105316 23.59917640686035 13.728596687316895";
 
-const ratio = 1.72;
+const ratio = 43 / 25;
 const IconVideo = ({ width, height, fillColour }) => (
   <Svg width={width || height * ratio} height={height} viewBox={viewBox}>
     <Rect