Ajoute bordure en dessous des main parameters

src/lib/components/legislation_view/parameters/VariableReferredParameters.svelte

@@ -220,7 +220,7 @@
     class:mt-5={billDecomposition?.children !== undefined}
   >
     {#if Object.keys(bothRootDirectParameterById).length > 0}
-      <section class="mb-3">
+      <section class="mb-2 border-b pb-4">
         <ul>
           {#each [...iterVariableRootParameters(bothRootDirectParameterById, rootParameter, revaluationRootParameter, billRootParameter)] as [bothFilteredParameter, lawParameter, revaluationParameter, billParameter]}
             <li>