Fixed typo for calibrators

[KKghub]

Fixes #6210

• There's a descriptive title that will make sense to other developers some time from now.
• There's associated issues. All PR's should have issue(s) associated - unless a trivial self-evident change such as fixing a typo. You can use the format Fixes #nnnn in your description to cause GitHub to automatically close the issue(s) when your PR is merged.
• Your change description explains what the change does, why you chose your approach, and anything else that reviewers should know.
• You have included any necessary tests in the same PR.

[codecov]

Codecov Report

Merging #6438 (9fb181e) into main (87337c0) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6438   +/-   ##
=======================================
  Coverage   68.55%   68.55%           
=======================================
  Files        1170     1170           
  Lines      246977   246977           
  Branches    25792    25792           
=======================================
  Hits       169303   169303           
  Misses      70951    70951           
  Partials     6723     6723           

Flag	Coverage Δ
Debug	68.55% <ø> (ø)
production	62.95% <ø> (ø)
test	88.96% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/Microsoft.ML.Data/TrainCatalog.cs	82.70% <ø> (ø)
src/Microsoft.ML.LightGbm/LightGbmTrainerBase.cs	79.50% <0.00%> (-0.28%)	⬇️
src/Microsoft.ML.Maml/MAML.cs	26.90% <0.00%> (+1.01%)	⬆️

[michaelgsharp]