[Chapel Merge] Update PyYAML version required by start_test to 5.

Branch: refs/heads/master
Revision: 01d1098
Author: ronawho
Log Message:

Merge pull request #17520 from ronawho/upgrade-pyyaml

Update PyYAML version required by start_test to 5.4.1

Modified Files:
M third-party/chpl-venv/test-requirements.txt

Compare: https://github.com/chapel-lang/chapel/compare/d4982943368a...01d1098dbebc