requirements.txt: update pyyaml to be compatible with Python 3.10
Signed-off-by: Leandro Belli leandro.belli@arm.com Change-Id: Ie8c1d80b9f32a5004c76a86351a018b4cfb7b2e6
Signed-off-by: Leandro Belli leandro.belli@arm.com Change-Id: Ie8c1d80b9f32a5004c76a86351a018b4cfb7b2e6