Update git submodules
- Update extensions/Cite from branch 'REL1_39' to 6c43de3bd677811645858f3ac2d4db8c4d55adac
- Localisation updates from https://translatewiki.net.
Change-Id: I226f409be418d7468a823f38b7c62ef862cca9fe
- Localisation updates from https://translatewiki.net.