Update the version of cryptography

[gmmajal]

Relevant issue: #123

Background info: # any relevant background info for additional context, references to documentations etc.

• dependabot has flagged a vulnerability in the cryptography package:https://github.com/zbw/qualle/security/dependabot/49.
• This package should be updated immediately.

Changes introduced: # list changes to the code repo made in this pull request

• The poetry.lock file has been updated.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (7ae1979) to head (56ca860).

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #124   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           22        22           
  Lines          906       906           
=========================================
  Hits           906       906           

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