Added info about cache

src/views/Debug.vue

@@ -2,7 +2,7 @@
   <section class="text container">
     <h2>Check your Retribute profile</h2>
     <p>If you're a creator and want to see what kind of information Retribute extract your profile, use the form below.
-      This will also refresh any cached data we may have for this profile.</p>
+    <p>Retribute will also keep profiles in cache for a few hours, which can be problematic when you want to check that your changes are valid. This from will also refresh any cached data we may have.</p>
     <form @submit.prevent="check" class="section">
       <div class="row">
         <div class="input-field col s12 l6">