Build Chef CI examples on all platforms

Bump third_party/pigweed/repo from `1f12d06` to `c9d5bef` #174

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
Chef - ESP32 CI Examples	13m 52s
Chef - Linux CI Examples	11m 40s
Chef - NRFConnect CI Examples	11m 55s
Chef - Telink CI Examples	10m 53s
	48m 20s