docs(changelog): version 1.18.15 [citest skip]

[richm]

Update changelog and .README.html for version 1.18.15

Signed-off-by: Rich Megginson rmeggins@redhat.com

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 10.72%. Comparing base (59fd1c6) to head (da28bcc).
Report is 49 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (59fd1c6) and HEAD (da28bcc). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (59fd1c6)	HEAD (da28bcc)
sanity	1	0

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #525      +/-   ##
==========================================
- Coverage   16.54%   10.72%   -5.83%     
==========================================
  Files           2        8       +6     
  Lines         284     1949    +1665     
  Branches       79        0      -79     
==========================================
+ Hits           47      209     +162     
- Misses        237     1740    +1503     

Flag	Coverage Δ
sanity	?

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ 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.