Update skinStyles with new vector skin key.
Update skinStyles with new vector skin key.

Bug: T292599
Change-Id: I810c7252f16747949efbb1c08a8e85f00e2b3db3

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo