This changes mentions of googlesource and Gerrit to instead link to the gem5 GitHub repository, and updates the documentation to reflect the GitHub review process. Change-Id: I5dc1d9fcf6b96f9e5116802f938b7e3bb5b09567 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/71878 Maintainer: Bobby Bruce <bbruce@ucdavis.edu> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>