Update git submodules
- Update extensions/Cite from branch 'REL1_39' to db8fe3b5a6a81943be2d4dda771b1fe050f4694d
- Localisation updates from https://translatewiki.net.
Change-Id: If00161b48487216ddeddac661ff5ca4bf2809ad2
- Localisation updates from https://translatewiki.net.