Minor grammar change

Author: Martín Cigorraga

templates/note.html

@@ -4,7 +4,7 @@
 <div class="form-group">
     <label for="secret_note">Here is your secret message:</label>
     <pre id="secret_note" class="hidden">{{.}}</pre>
-    <p align='center'>The note on the server has been destroyed
+    <p align='center'>The note on the server has already been destroyed
         <span class="glyphicon glyphicon-fire"></span>
     </p>
     <p align='center'>