pyyaml: upgraded package to upstream

Upgraded dev-python/pyyaml to version 6.0.1-r1.

BUG=b/335530613,b/335531105,b/335669123
TEST=presubmit
RELEASE_NOTE=Updated dev-python/pyyaml to version 6.0.1. This fixed CVE-2017-18342, CVE-2020-14343, CVE-2020-1747.

Change-Id: I5bef9787a90d954f13972388311a3b16a1964e1d
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/portage-stable/+/70151
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Oleksandr Tymoshenko <ovt@google.com>
4 files changed