Updated mediawiki/extensions
Project: mediawiki/extensions/UploadWizard  e4560e98c58b2b437b1755b2a36cc3db6adfe0b9

Fix concurrent upload preference

Added 'default' to the array of valid options, should do now.

Change-Id: I5cd78fca9009a390c79899efa02226a7ffa9c02b