Fix lxml qname in argument

[leon1995]

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have updated the changelog accordingly.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Attention: Patch coverage is 95.52239% with 3 lines in your changes missing coverage. Please review.

Project coverage is 90.87%. Comparing base (17d57db) to head (d53a8e3).

Files with missing lines	Patch %	Lines
src/sdc11073/namespaces.py	96.00%	2 Missing ⚠️
src/sdc11073/xml_types/pm_types.py	88.88%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #414   +/-   ##
=======================================
  Coverage   90.87%   90.87%           
=======================================
  Files         125      125           
  Lines       14700    14701    +1     
=======================================
+ Hits        13358    13359    +1     
  Misses       1342     1342           

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