Updated mediawiki/extensions
Project: mediawiki/extensions/Configure  5920e1c87d03f023e2d2f4bd64378ce0864e2d38

Replace "an" by "a" in the message "configure-setting-wgUserEmailConfirmationTokenExpiry", etc.

Change-Id: Ie0cc75bef6ccb484df880a77c3484b43b8b04919