Updated mediawiki/extensions
Project: mediawiki/extensions/PageSchemas  25b71dda58c7afdc4361dac9f2db47378bd6f244

Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: Ia73a68f470b9e4a62dbf3c53acd3fb2301bce047