Updated mediawiki/extensions
Project: mediawiki/extensions/WikimediaMessages  4ba6d0806880287beb290a2c69b35fd673f98ad1

Make JSON valid per Nikerabbit's CR

Followup to I577c1f5acd7d1182a9a00b1c843221deb6f55dde

Change-Id: I18ec4285d1a0e524a841e797f5e125b399ddefb9