ASVS: password length to 12

[taylordowns2000]

Note that after this gets shipped to demo in a release, we must merge this: OpenFn/docs#571

Description

This PR changes the minimum required password length to 12 in alignment with https://github.com/OWASP/ASVS/blob/master/4.0/en/0x11-V2-Authentication.md?plain=1#L43

Pre-submission checklist

• I have performed a self-review of my code.
• I have implemented and tested all related authorization policies. (e.g., :owner, :admin, :editor, :viewer)
• I have updated the changelog.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.44%. Comparing base (6a56fc3) to head (18ef06b).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2507   +/-   ##
=======================================
  Coverage   90.44%   90.44%           
=======================================
  Files         314      314           
  Lines       10875    10875           
=======================================
  Hits         9836     9836           
  Misses       1039     1039           

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