Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceExtensions  052fdd4ae0722e1a41b2d80a929a10964384a167

Added missing PLURAL distinction in message

There is no need for a code change because the number of elements for
PLURAL distinction is already passed.

 * Corrected and improved message documentation

Change-Id: Ic96759b22e6272800daf1d00ac6cdaac7c149130