Update git submodules
- Update extensions/ReplaceText from branch 'REL1_42' to 62421d6e7d252b0b9c8c0d9896169045c215886d
- Localisation updates from https://translatewiki.net.
Change-Id: Iee07f142b0b3915600ec13eb1b698f10f82988df
- Localisation updates from https://translatewiki.net.