Updated mediawiki/skins
Project: mediawiki/skins/chameleon  5621e05de6bc75f55e536ce9f4d9e5be476615c9

Let jumped-to section heads appear below fixed/sticky header

Also works for 'clean' layout, but needs some more tweaking for when the header
is not displayed. In that case the section head is still offset, i.e. appears
too low.

Change-Id: I8a109b7f46f1da50e4d22dbd46676d0755cf2648