Fix missing unit in _TZE200_pay2byax quirk

[tr4nt0r]

Proposed change

Adds unit lx to _TZE200_pay2byax quirk

Requires:

• Sensor init fails if unit of measurement is a string zha#326

Additional information

Checklist

• The changes are tested and work correctly
• pre-commit checks pass / the code has been formatted using Black
• Tests have been added to verify that the new code works

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.79%. Comparing base (97413e3) to head (ab8c483).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #3563   +/-   ##
=======================================
  Coverage   89.79%   89.79%           
=======================================
  Files         323      323           
  Lines       10414    10414           
=======================================
  Hits         9351     9351           
  Misses       1063     1063           

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