Update Readme with password length change and None password strategy

[mathieutu]

Hi,
I'm updating the documentation following the recent changes and discussions we had (#42 and #43).

Thanks.
Mathieu.

[codecov]

Codecov Report

Base: 88.57% // Head: 88.57% // No change to project coverage 👍

Coverage data is based on head (79553a8) compared to base (56b2d6a).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #51   +/-   ##
=========================================
  Coverage     88.57%   88.57%           
  Complexity       61       61           
=========================================
  Files            11       11           
  Lines           499      499           
  Branches         92       92           
=========================================
  Hits            442      442           
  Misses           21       21           
  Partials         36       36           

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