Update JoinRuleDialog labels

src/i18n/strings/en_EN.json

@@ -3730,10 +3730,10 @@
         "unavailable": "Unavailable"
     },
     "update_room_access_modal": {
-        "description": "To create a share link, you need to allow guests to join this room. This may make the room less secure. When you're done with the call, you can make the room private again.",
-        "dont_change_description": "Alternatively, you can hold the call in a separate room.",
+        "description": "To create a shareable link, guests must have permission to join this room. You can remove these permissions later in Settings.",
+        "dont_change_description": "Alternatively, create a new room.",
         "no_change": "I don't want to change the access level.",
-        "title": "Change the room access level"
+        "title": "Update permissions"
     },
     "upload_failed_generic": "The file '%(fileName)s' failed to upload.",
     "upload_failed_size": "The file '%(fileName)s' exceeds this homeserver's size limit for uploads",