Update language in wiki page for new EpiModelHIV-template folders

[clchand23]

Hi @AdrienLeGuillou - I think the text below needs to be updated to match the new folders in the EpiModelHIV-template.

https://github.com/EpiModel/EpiModeling/wiki/Getting-Started-with-EpiModelHIV

"Test out running EpiModelHIV by running R scripts 01, 02, 03, and 04a in the R folder of your project repo. This will estimate the network models (netest), diagnose them (netdx), and then run a basic HIV transmission model (netsim). Note at the bottom of the 04a file, it provides an example of how to run EpiModelHIV in debug/browser mode; don't run that step quite yet."

[AdrienLeGuillou]

Thanks, I'll add that to my list :-)