cubicweb #3463136 copyright footer on docs says 2011, should say 2014 [validation pending]

cf title

prioritynormal
typebug
done in3.18.3
load0.100
load left0.000
closed by#33a7db07201e [doc] Update copyright date to 2014 (closes #3463136)
patch[doc] Update copyright date to 2014 (closes #3463136) [applied]