[css-fonts-4] [varfonts] Migrate font-stretch percentages from OpenType OS/2 spec

Author: litherum

css-fonts-4/Overview.bs

@@ -229,15 +229,15 @@ at least as dark as its predecessor. Only values between 1 - 999 are valid, and
 	</tr>
 	</thead>
 	<tbody>
-	<tr><th>ultra-condensed</th><th>80%</th></tr>
-	<tr><th>extra-condensed</th><th>85%</th></tr>
-	<tr><th>condensed</th><th>90%</th></tr>
-	<tr><th>semi-condensed</th><th>95%</th></tr>
+	<tr><th>ultra-condensed</th><th>50%</th></tr>
+	<tr><th>extra-condensed</th><th>62.5%</th></tr>
+	<tr><th>condensed</th><th>75%</th></tr>
+	<tr><th>semi-condensed</th><th>87.5%</th></tr>
 	<tr><th>normal</th><th>100%</th></tr>
-	<tr><th>semi-expanded</th><th>105%</th></tr>
-	<tr><th>expanded</th><th>110%</th></tr>
-	<tr><th>extra-expanded</th><th>115%</th></tr>
-	<tr><th>ultra-expanded</th><th>120%</th></tr>
+	<tr><th>semi-expanded</th><th>112.5%</th></tr>
+	<tr><th>expanded</th><th>125%</th></tr>
+	<tr><th>extra-expanded</th><th>150%</th></tr>
+	<tr><th>ultra-expanded</th><th>200%</th></tr>
 	</tbody>
 	</table>