Update Ebola practicals part 2

[Thibaut Jombart]

Some of the packages used in the Ebola practicals part 1 and 2 have changed. It would be good to recompile these practicals, and maybe update a couple of practices illustrated in them. This issue concerns part 2 only.

Links

• part 2:
  https://www.reconlearn.org/post/practical-ebola-reconstruction.html

• part 1 (though not for this issue):
  https://www.reconlearn.org/post/simulated-evd-early.html