Adding missing code for Serbian Latin

[dwbit]

Crowdin was throwing an error because sr_CS was missing. Now Crowdin should pull Serbian (Cyrillic) and Serbian (Latin)

Type of change

• [ X] Bug fix
• [ ] New feature development
• [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
• [ ] Build/deploy pipeline (DevOps)
• [ ] Other

[djsmith85]

@dwbit As mentioned, I think there's more to this but lets discuss this tomorrow after the repos has moved.