Update git submodules
Update git submodules

* Update scripts/i18n from branch 'master'
  to 37535a855e1189d34c7e98ed689c7af7fa70a814
  - Merge "[i18n] recover checkimages/sr.json"
  - [i18n] recover checkimages/sr.json
    
    Bug: T224331
    Bug: T220178
    Change-Id: Iea30ecd8dd50260fc4d1ec9116b45bd6de6fd028
    
PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core,wikimedia/pywikibot-core