Accept HTML in 'note' attribute of variable.

src/lib/components/variables/VariableHeader.svelte

@@ -148,7 +148,7 @@
         {#if note !== undefined}
           <div class="text-sm text-black mb-4 leading-normal font-serif">
             <p class="break-words">
-              {note}
+              {@html note}
             </p>
           </div>
         {/if}