DM-53079: Modernize license specifier

[timj]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 35.26%. Comparing base (6894bb1) to head (9ef71d4).
⚠️ Report is 7 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #99   +/-   ##
=======================================
  Coverage   35.26%   35.26%           
=======================================
  Files          13       13           
  Lines        1296     1296           
  Branches      212      212           
=======================================
  Hits          457      457           
  Misses        819      819           
  Partials       20       20           

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