[repo] remove ci-concurrency from sln items

[SimonCropp]

Changes

remove ci-concurrency from sln items since it doesnt exist.

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: SimonCropp / name: Simon Cropp (b0b66b3)
• ✅ login: CodeBlanch / name: Mikel Blanchard (61e5d7e)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.40%. Comparing base (48e5a08) to head (61e5d7e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6071   +/-   ##
=======================================
  Coverage   86.40%   86.40%           
=======================================
  Files         257      257           
  Lines       11656    11656           
=======================================
  Hits        10071    10071           
  Misses       1585     1585