Build Chef CI examples on all platforms

Bump third_party/imgui/repo from `2860d7b` to `39585aa` #932

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
Chef - ESP32 CI Examples	1m 4s
Chef - Linux CI Examples	4m 39s
Chef - NRFConnect CI Examples	1m 34s
Chef - Telink CI Examples	1m 33s
	8m 50s