[doc/Makefile] Update pinocchio to 2.1.11.
[doc/Makefile] Update pinocchio to 2.1.11.

jmirabel/hpp-doc,florent-lamiraux/hpp-doc,florent-lamiraux/hpp-doc,humanoid-path-planner/hpp-doc,jmirabel/hpp-doc,humanoid-path-planner/hpp-doc