Extend testing of artist page

lib/music_library_web/live/artist_live/show.html.heex

@@ -62,6 +62,7 @@
     </h2>
     <%!-- TODO: replace with OSS version --%>
     <ul
+      id="collection"
       role="list"
       class="mt-4 grid grid-cols-2 gap-x-4 gap-y-8 sm:grid-cols-3 sm:gap-x-6 lg:grid-cols-4 xl:gap-x-8"
     >
@@ -101,6 +102,7 @@
     </h2>
     <%!-- TODO: replace with OSS version --%>
     <ul
+      id="wishlist"
       role="list"
       class="mt-4 grid grid-cols-2 gap-x-4 gap-y-8 sm:grid-cols-3 sm:gap-x-6 lg:grid-cols-4 xl:gap-x-8"
     >