ci: pin version of config @commitlint/config-conventional to 18.5

[rsdmike]

PR Checklist

• Unit Tests have been added for new changes
• API tests have been updated if applicable
• All commented code has been removed
• If you've added a dependency, you've ensured license is compatible with Apache 2.0 and clearly outlined the added dependency.

What are you changing?

Anything the reviewer should know when reviewing this PR?

If the there are associated PRs in other repositories, please link them here (i.e. open-amt-cloud-toolkit/repo#365 )

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (57a98eb) 87.49% compared to head (6040b70) 87.49%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1425   +/-   ##
=======================================
  Coverage   87.49%   87.49%           
=======================================
  Files         116      116           
  Lines        4893     4893           
  Branches      861      861           
=======================================
  Hits         4281     4281           
  Misses        567      567           
  Partials       45       45           

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[RosieAMT]

🎉 This PR is included in version 2.22.1 🎉

The release is available on:

• GitHub release
• v2.22.1

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