Fixing flaky TargetDistributionDataCheck test

[ParthivNaresh]

Fixes #2581

New test rounds the Shapiro value to the tenths place. Confirmed that the old test ran into a rounding issue once every few thousand runs. This test passed after 30,000 runs so I'm assuming the problem should be fixed.

This fix is fine for now until we can address #2749

[codecov]

Codecov Report

Merging #2748 (d50f9fb) into main (214be16) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##            main   #2748   +/-   ##
=====================================
  Coverage   99.9%   99.9%           
=====================================
  Files        301     301           
  Lines      27819   27819           
=====================================
  Hits       27770   27770           
  Misses        49      49           

Impacted Files	Coverage Δ
...alml/data_checks/target_distribution_data_check.py	100.0% <ø> (ø)
...hecks_tests/test_target_distribution_data_check.py	100.0% <ø> (ø)

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[chukarsten]

Nice, thanks Parthiv!