deps: update bundled library version from v7.7.1 to v8.0.0

[charlievieth]

Update the bundled simdutf library from version v7.7.1 to v8.0.0.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (4d5979b) to head (172f7d0).

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #26   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           47        47           
=========================================
  Hits            47        47           

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