fix(curriculum): remove forbidden hr from ol (#10786)

Author: fiji-flo

Diff for: client/src/curriculum/modules-list.scss

@@ -33,9 +33,10 @@
         grid-template-columns: auto auto auto 1fr;
       }
 
-      hr {
+      &::before {
         border: none;
         border-top: 1px solid var(--text-inactive);
+        content: "";
         grid-area: hr;
         margin: 0 0 1.5rem;
         width: 100%;

Diff for: client/src/curriculum/modules-list.tsx

@@ -14,7 +14,6 @@ export function ModulesListList({
   const [tab, setTab] = useState(1);
   return (
     <ol className="modules-list-list">
-      <hr />
       {modules.map((modulesList, i) => {
         return (
           <li