Update git submodules
Update git submodules

* Update scripts/i18n from branch 'master'
  to 704d57ec91959359e60de9a071ea68fa38a522bc
  - Localisation updates from https://translatewiki.net.
    
    Change-Id: Iabe992107f7a6e62f567ade738b6aacb8fa6a22b
    
wikimedia/pywikibot-core,wikimedia/pywikibot-core