fix inline highlighting

Author: jderochervlk

src/Playground.res

@@ -810,7 +810,7 @@ module WarningFlagsWidget = {
           <section className="mt-3">
             <input
               ref={ReactDOM.Ref.domRef((Obj.magic(inputRef): React.ref<Nullable.t<Dom.element>>))}
-              className="inline-block p-1 max-w-20 outline-hidden bg-gray-90 placeholder-gray-20 placeholder-opacity-50"
+              className="inline-block p-1 max-w-20 outline-hidden bg-gray-90 placeholder-gray-20/50"
               placeholder="Flags"
               type_="text"
               tabIndex=0

src/components/Markdown.res

@@ -186,7 +186,7 @@ module InlineCode = {
   @react.component
   let make = (~children) =>
     <code
-      className="md-inline-code px-2 py-0.5  text-gray-60 font-mono rounded-sm bg-gray-10-tr border border-gray-90 border-opacity-5">
+      className="md-inline-code px-2 py-0.5  text-gray-60 font-mono rounded-sm bg-gray-10-tr border border-gray-90/5">
       children
     </code>
 }