Build Chef CI examples on all platforms

Bump third_party/imgui/repo from `2860d7b` to `a6bcbb1` #923

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
Chef - ESP32 CI Examples	8m 0s
Chef - Linux CI Examples	4m 48s
Chef - NRFConnect CI Examples	6m 28s
Chef - Telink CI Examples	9m 22s
	28m 38s