The use of this function has been deprecated for a long time[0]. With
PyYAML==6.0 the call is now failing, so replace it with the safe
version.
[0] https://msg.pyyaml.org/load
Signed-off-by: Jens Harbott <frickler@offenerstapel.de>
Change-Id: I7a170262b50a5c80a516095b872d52e1bea5479d