Update CONTRIBUTING.md (#5011)
Update CONTRIBUTING.md (#5011)

* Update CONTRIBUTING.md

* Update CONTRIBUTING.md

Minor changes

Co-authored-by: Madhava Jay <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@madhavajay.com>
OpenMined/PySyft,OpenMined/PySyft,OpenMined/PySyft,OpenMined/PySyft