Bug 1511340 - fix another typo to restore align=center to the devedition sync box, r=zbraniecki

Differential Revision: https://phabricator.services.mozilla.com/D13540

--HG--
extra : moz-landing-system : lando

browser/components/preferences/in-content/main.xul

@@ -33,7 +33,7 @@
   <vbox id="separateProfileBox">
     <checkbox id="separateProfileMode"
               data-l10n-id="separate-profile-mode"/>
-    <hbox id="sync-dev-edition-root" lign="center" class="indent" hidden="true">
+    <hbox id="sync-dev-edition-root" align="center" class="indent" hidden="true">
       <label id="useFirefoxSync" data-l10n-id="use-firefox-sync"/>
       <deck id="getStarted">
         <label class="text-link" data-l10n-id="get-started-not-logged-in"/>