Rename application sections

lib/music_library_web/components/layouts/app.html.heex

@@ -3,12 +3,11 @@
     <div class="flex h-16 justify-between">
       <div class="flex">
         <div class="ml-6 flex space-x-8">
-          <!-- Current: "border-indigo-500 text-gray-900", Default: "border-transparent text-gray-500 hover:border-gray-300 hover:text-gray-700" -->
-          <a href="/" class={nav_link_class(assigns[:nav_section], :dashboard)}>
-            Dashboard
+          <a href="/" class={nav_link_class(assigns[:nav_section], :stats)}>
+            Stats
           </a>
           <a href={~p"/records"} class={nav_link_class(assigns[:nav_section], :records)}>
-            Records
+            Collection
           </a>
         </div>
       </div>