chore: version bump for changelog and package#2657

SamuelBellomo merged 2 commits intorelease/1.6.0Unity-Technologies/com.unity.netcode.gameobjects:release/1.6.0from

release/1.6.0-prep/version-bumpUnity-Technologies/com.unity.netcode.gameobjects:release/1.6.0-prep/version-bumpCopy head branch name to clipboard