Update git submodules
Update git submodules

* Update scripts/i18n from branch 'master'
  to cf5024ad9360a36e13b2b99fbaa8aaffa13c70c2
  - [i18n] Copy cosmetic_changes-append to pywikibot-cosmetic-changes
    
    cosmetic_changes-append is used by the framework itself but not by
    the cosmetic_changes script. pywikibot translation packages will be
    supported by the site-package too. Therefore this message should be
    available with pywikibot i18n package. cosmetic_changes-append
    can be removed later.
    
    Change-Id: I745887482d260dca3a3e65553d8d1969c812b473
    
wikimedia/pywikibot-core,wikimedia/pywikibot-core