Update git submodules
Update git submodules

* Update scripts/i18n from branch 'master'
  to 39143fece762f440f313a8a0d0e3c478e11853a0
  - Localisation updates from https://translatewiki.net.
    
    Change-Id: Iddaa7b6ab9ed28e56e631e77ed92cd86d67f3a25
    
wikimedia/pywikibot-core,wikimedia/pywikibot-core