T11179: Update wikis version and theme

[Carl Schwan]

ognarb closed subtask T11426: Move away from LiquidThreads in the wikis as "Resolved".

TASK DETAIL
  https://phabricator.kde.org/T11179

To: ognarb
Cc: trickyricky26, xyquadrat, felixernst, mmustac, yurchor, kde-doc-english, ognarb, dmenig, manueljlin, Orage, cblack, konkinartem, ian, jguidon, Ghost6, jraleigh, gennad, fbampaloukas, squeakypancakes, alexde, IohannesPetros, GB_2, crozbo, Anachronox, ndavis, firef, ngraham, skadinna, aaronhoneycutt, jriddell, sheedy, lydia, ochurlaud, kvermette, mbohlender
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