Update pygit2 to 0.28.1 (#11224)
Update pygit2 to 0.28.1 (#11224)

* Update pygit2 from 0.28.0 to 0.28.1

* Fix requirements file with wheel package sha256 hashes

psiinon/addons-server,kumar303/addons-server,psiinon/addons-server,eviljeff/olympia,eviljeff/olympia,psiinon/addons-server,bqbn/addons-server,diox/olympia,kumar303/addons-server,mozilla/olympia,mozilla/olympia,diox/olympia,bqbn/addons-server,wagnerand/addons-server,mozilla/olympia,mozilla/addons-server,diox/olympia,wagnerand/addons-server,kumar303/olympia,mozilla/addons-server,kumar303/olympia,eviljeff/olympia,bqbn/addons-server,wagnerand/addons-server,wagnerand/addons-server,eviljeff/olympia,bqbn/addons-server,diox/olympia,psiinon/addons-server,kumar303/addons-server,kumar303/addons-server,mozilla/addons-server,kumar303/olympia,kumar303/olympia,mozilla/addons-server,mozilla/olympia