Update git submodules
- Update BlueSpicePageTemplates from branch 'master' to 6f48c6643c2f9c312c7cca9630670fdd37a3d15f
- Localisation updates from https://translatewiki.net.
Change-Id: I4210e24d1923097b94b6e763833411ce88dd32ad
- Localisation updates from https://translatewiki.net.