[BUG] correct parameter name in TestAllObjects all_objects call

[fkiraly]

This corrects the parameter name in TestAllObjects all_objects call, from exclude_estimators to exclude_objects.

[codecov-commenter]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (1b5d4a8) 83.55% compared to head (225c1b0) 83.55%.
Report is 7 commits behind head on main.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #236   +/-   ##
=======================================
  Coverage   83.55%   83.55%           
=======================================
  Files          41       41           
  Lines        2833     2833           
=======================================
  Hits         2367     2367           
  Misses        466      466           

Files	Coverage Δ
skbase/testing/test_all_objects.py	79.43% <ø> (ø)

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