Resolved bento warnings

[linkous8]

Bento Output:

flake8 undefined-name https://lintlyci.github.io/Flake8Rules/rules/F821.html          
     > measure:63                                                                     
     ╷                                                                                
   63│   sys.exit(3)                                                                  
     ╵                                                                                
     = undefined name 'sys'

bandit yaml-load https://bandit.readthedocs.io/en/latest/plugins/b506_yaml_load.html
     > measure:274
     ╷
  274│   d = yaml.load(f)
     ╵
     = Use of unsafe yaml load. Allows instantiation of arbitrary objects.
       Consider yaml.safe_load().