lib: fix constructor in _errnoException stack tree

[SeokhunEom]

Fixes the constructor name in the stack tree for _errnoException.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.54%. Comparing base (b13f24c) to head (9045847).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #60156   +/-   ##
=======================================
  Coverage   88.53%   88.54%           
=======================================
  Files         703      703           
  Lines      207997   207997           
  Branches    40015    40020    +5     
=======================================
+ Hits       184150   184167   +17     
+ Misses      15864    15854   -10     
+ Partials     7983     7976    -7     

Files with missing lines	Coverage Δ
lib/util.js	97.95% <100.00%> (ø)

... and 26 files with indirect coverage changes

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