fix: fix missing config for image path

[firstof9]

Proposed change

Set a default image path.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests
• Documentation update
• Adds a new shipper
• Update existing shipper

Additional information

• This PR fixes or closes issue: fixes Error updating sensor: usps_mail reason: listdir: path should be string, bytes, os.PathLike, integer or None, not tuple #944

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.32%. Comparing base (8608d22) to head (411b60d).
Report is 21 commits behind head on dev.

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #945      +/-   ##
==========================================
- Coverage   95.07%   93.32%   -1.75%     
==========================================
  Files           8        8              
  Lines        1482     1558      +76     
==========================================
+ Hits         1409     1454      +45     
- Misses         73      104      +31     

Files	Coverage Δ
custom_components/mail_and_packages/__init__.py	92.70% <100.00%> (+0.60%)	⬆️
custom_components/mail_and_packages/config_flow.py	92.85% <100.00%> (-7.15%)	⬇️
custom_components/mail_and_packages/const.py	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes