fix: Fix typing errors due to python-docx update

[ReinderVosDeWael]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.

Project coverage is 87.11%. Comparing base (8a780b9) to head (7f07f5a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/cmi_docx/run.py	60.00%	2 Missing ⚠️
src/cmi_docx/document.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #26      +/-   ##
==========================================
- Coverage   87.38%   87.11%   -0.28%     
==========================================
  Files           6        6              
  Lines         222      225       +3     
==========================================
+ Hits          194      196       +2     
- Misses         28       29       +1     

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