Update git submodules
- Update extensions/CiteThisPage from branch 'REL1_43' to 975e6a53197ab89dad2073b2337a18d3ccf1fc26
- Localisation updates from https://translatewiki.net.
Change-Id: Ib1af943f2f30cf55befac725db6c308e202159c6
- Localisation updates from https://translatewiki.net.