Updated mediawiki/skins
Project: mediawiki/skins/Vector  9ebb220b7f72d3702f459fb597f360f5e24c9f0c

Use mw-wiki-logo class instead of inline background-image

Depends on I89e32fcd2 in mediawiki-core.

Bug: 56257
Change-Id: I890a7c3ec1531bc630aa8274f3e6ce28810d1b02