chore: migrate quick start fixes to v2.x.x. branch#3787

NoelStephensUnity merged 3 commits intodevelop-2.0.0Unity-Technologies/com.unity.netcode.gameobjects:develop-2.0.0from

fix/clientserver-quickstart-scripts-up-port-2.x.xUnity-Technologies/com.unity.netcode.gameobjects:fix/clientserver-quickstart-scripts-up-port-2.x.xCopy head branch name to clipboard