Updated mediawiki/extensions
Project: mediawiki/extensions/PageBlock  62670efd1b3e93f446b8aa529df689e79cd523e2

Migrate to JSON i18n

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

Change-Id: I9ecf4ea278e7d4e0b95a5a9bbbf096519ab83ed8