[KB] Add GitHub token permissions for py-actions/flake8 Action

[step-security-bot]

This PR adds a YAML file to describe token permissions needed for Action: py-actions/flake8. Fixes #1323

[codecov-commenter]

Codecov Report

Base: 56.71% // Head: 56.71% // No change to project coverage :thumbsup:

Coverage data is based on head (b2c2f00) compared to base (9ab4708). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1324   +/-   ##
=======================================
  Coverage   56.71%   56.71%           
=======================================
  Files          14       14           
  Lines        1423     1423           
=======================================
  Hits          807      807           
  Misses        553      553           
  Partials       63       63           

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