Update git submodules
Update git submodules

* Update scripts/i18n from branch 'master'
  to 8e12993181baccc754476598d457638366f1f3cc
  - Localisation updates from https://translatewiki.net.
    
    Change-Id: Iac3f638cc586410407c82da38a43a2fef65b14c0
    
wikimedia/pywikibot-core,PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core