Fix cast float test precision

[laggui]

Related Issues/PRs

As correctly pointed out on discord, this test will always fail if we cast from f16 or bf16 which have a lower precision.

Changes

Changed the precision tolerance.

Testing

Tested on cuda backend with f16 and bf16 (with bf16 having the lowest precision).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.86%. Comparing base (6aa470b) to head (c5179ee).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2586   +/-   ##
=======================================
  Coverage   81.86%   81.86%           
=======================================
  Files         833      833           
  Lines      106465   106465           
=======================================
  Hits        87162    87162           
  Misses      19303    19303           

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