Mention following groups on the registration page

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/i18n/en_US.json

@@ -1252,5 +1252,6 @@
   "Reject member": "Reject member",
   "The membership request from {profile} was rejected": "The membership request from {profile} was rejected",
   "The member was approved": "The member was approved",
-  "Emails usually don't contain capitals, make sure you haven't made a typo.": "Emails usually don't contain capitals, make sure you haven't made a typo."
+  "Emails usually don't contain capitals, make sure you haven't made a typo.": "Emails usually don't contain capitals, make sure you haven't made a typo.",
+  "To follow groups and be informed of their latest events": "To follow groups and be informed of their latest events"
 }

js/src/i18n/fr_FR.json

@@ -1356,5 +1356,6 @@
   "Reject member": "Rejeter le ou la membre",
   "The membership request from {profile} was rejected": "La demande d'adhésion de {profile} a été rejetée",
   "The member was approved": "Le ou la membre a été approuvée",
-  "Emails usually don't contain capitals, make sure you haven't made a typo.": "Les emails ne contiennent d'ordinaire pas de capitales, assurez-vous de n'avoir pas fait de faute de frappe."
+  "Emails usually don't contain capitals, make sure you haven't made a typo.": "Les emails ne contiennent d'ordinaire pas de capitales, assurez-vous de n'avoir pas fait de faute de frappe.",
+  "To follow groups and be informed of their latest events": "Afin de suivre des groupes et être informé de leurs derniers événements"
 }

js/src/views/User/Register.vue

@@ -53,6 +53,13 @@
                     )
                   }}
                 </li>
+                <li v-if="config.features.groups">
+                  {{
+                    $t(
+                      "To follow groups and be informed of their latest events"
+                    )
+                  }}
+                </li>
               </ul>
             </div>
           </div>