ci: Add core-keeper as part of scopes for semantic PR check

[judehung]

The core-keeper is missing from the scopes of semantic PR check, add it into the list.

If your build fails due to your commit message not passing the build checks, please review the guidelines here: https://github.com/edgexfoundry/edgex-go/blob/main/.github/Contributing.md

PR Checklist

Please check if your PR fulfills the following requirements:

• I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• I am not introducing a new dependency (add notes below if you are)
• I have added unit tests for the new feature or bug fix (if not, why?)
• I have fully tested (add details below) this the new feature or bug fix (if not, why?)
• I have opened a PR for the related docs change (if not, why?)

Testing Instructions

New Dependency Instructions (If applicable)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 21.17%. Comparing base (dd9e956) to head (559c4c9).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5331   +/-   ##
=======================================
  Coverage   21.17%   21.17%           
=======================================
  Files         285      285           
  Lines       20958    20958           
=======================================
  Hits         4438     4438           
  Misses      16167    16167           
  Partials      353      353           

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[cloudxxx8]

LGTM