docs: add responsible disclosure text to security

[dpgaspar]

Description

Adds a responsible disclosure text to docs and to github security policy

ADDITIONAL INFORMATION

• Has associated issue:
• Is CRUD MVC related.
• Is Auth, RBAC security related.
• Changes the security db schema.
• Introduces new feature
• Removes existing feature

[codecov]

Codecov Report

Merging #1882 (1057b37) into master (93a446c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1882   +/-   ##
=======================================
  Coverage   77.64%   77.64%           
=======================================
  Files          70       70           
  Lines        8556     8556           
=======================================
  Hits         6643     6643           
  Misses       1913     1913           

Flag	Coverage Δ
python	77.64% <ø> (ø)

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