Build Chef CI examples on all platforms

Bump third_party/imgui/repo from `88fec09` to `561af15` #331

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
Chef - ESP32 CI Examples	14m 35s
Chef - Linux CI Examples	11m 45s
Chef - NRFConnect CI Examples	12m 52s
Chef - Telink CI Examples	11m 5s
	50m 17s