Update GettingStarted.md
Update GettingStarted.md

Former-commit-id: d42c8032e9a0fd941ee04d1148916fc1abc7d78f
tomdee/libnetwork-plugin,djosborne/libcalico,alexhersh/libcalico,Symmetric/libcalico,tomdee/libcalico,L-MA/libcalico,robbrockbank/libcalico,plwhite/libcalico,insequent/libcalico,TrimBiggs/libnetwork-plugin,TrimBiggs/libnetwork-plugin,caseydavenport/libcalico,TrimBiggs/libcalico,projectcalico/libcalico,projectcalico/libnetwork-plugin