lib: use messageonly type when notable-changes sec release

[RafaelGSS]

Fixes: https://github.com/nodejs-private/security-release/issues/48

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.86%. Comparing base (021161b) to head (d010aab).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #910      +/-   ##
==========================================
- Coverage   80.05%   79.86%   -0.19%     
==========================================
  Files          39       39              
  Lines        4673     4684      +11     
==========================================
  Hits         3741     3741              
- Misses        932      943      +11     

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

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.