chore(deps): force yaml above 2.8.3

[CodeDredd]

Last dependabot follow-up: one remaining yaml@2 chain resolved below the patched 2.8.3. Override added, builds + tests green.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.26%. Comparing base (5332397) to head (d26996b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2057   +/-   ##
=======================================
  Coverage   99.26%   99.26%           
=======================================
  Files          83       83           
  Lines        3244     3244           
  Branches      562      562           
=======================================
  Hits         3220     3220           
  Misses         17       17           
  Partials        7        7           

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