crate.version: Decrease margin between readme and sidebar

Everything else is using 20px, so we should do the same here to give the README a bit more space for rendering

Author: Turbo87

app/styles/crate/version.module.css

@@ -66,7 +66,7 @@ div.header {
 .docs {
     @media only screen and (min-width: 890px) {
         flex: 7;
-        padding-right: 40px;
+        padding-right: 20px;
         max-width: 640px;
     }
 }