fix summary section in simulate transmission episode

To maintain continuity and facilitate a seamless learning experience for our audience, it would be beneficial, in my opinion, to conclude this summary by alluding to the epidemic models that will be discussed in the upcoming episode. This approach ties the episodes together.

_Originally posted by @Degoot-AM in https://github.com/epiverse-trace/tutorials-late/pull/19#discussion_r1572948509_