Add welcome message to dashboard

resources/js/Pages/Dashboard/Index.vue

 <template>
   <layout title="Dashboard">
     <h1 class="mb-8 font-bold text-3xl">Dashboard</h1>
-    <div class="mt-16">
+    <p class="mb-12 leading-normal">Hey there! Welcome to Ping CRM, a demo app designed to help illustrate how <a class="text-indigo underline hover:text-orange-dark" href="https://github.com/inertiajs">Inertia.js</a> works.</p>
+    <div>
       <inertia-link class="btn-indigo" href="/500">500 error</inertia-link>
       <inertia-link class="btn-indigo" href="/404">404 error</inertia-link>
     </div>