docs: Reference exceptions in CONTRIBUTING.md

[doronkg]

What this PR does / why we need it?

Reference pkg/kor/exceptions in directory structure under CONTRIBUTING.md.

PR Checklist

• This PR adds K8s exceptions (false positives)
• This PR adds new code
• This PR includes tests for new/existing code
• This PR adds docs

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.86%. Comparing base (673c21e) to head (a9b0292).
Report is 1 commits behind head on main.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #367      +/-   ##
==========================================
- Coverage   44.48%   42.86%   -1.62%     
==========================================
  Files          63       63              
  Lines        3356     3961     +605     
==========================================
+ Hits         1493     1698     +205     
- Misses       1622     2022     +400     
  Partials      241      241              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.