Build Chef CI examples on all platforms

Bump third_party/ot-br-posix/repo from `bd15f71` to `795f512` #1867

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
Chef - ESP32 CI Examples	13m 56s
Chef - Linux CI Examples	5m 41s
Chef - NRFConnect CI Examples	6m 47s
Chef - Telink CI Examples	11m 36s
	38m 0s