Update git submodules
Update git submodules

* Update scripts/i18n from branch 'master'
  to b63f8bdab970b059c763fe5f0e05696b618dd461
  - Localisation updates from https://translatewiki.net.
    
    Change-Id: I30b02ceffa8323bc4632f3ad530a20cb05ce5ab6
    
wikimedia/pywikibot-core,wikimedia/pywikibot-core