Pontoon: Update Belarusian (be) localization of Firefox Accounts

Co-authored-by: Mikalai Udodau <crom-a@tut.by>

locale/be/settings.ftl

@@ -89,6 +89,7 @@ connect-another-find-fx-mobile =
 ## Connected services section
 
 cs-heading = Падключаныя паслугі
+cs-description = Усё, чым вы карыстаецеся і дзе ўвайшлі.
 cs-cannot-disconnect = Кліент не знойдзены, не ўдалося адключыць
 # This string is used in a notification message near the top of the page.
 # Variables: