fix: update ES import path in documentation

[zamadye]

hey, i noticed the tree-shakeable import example was using validator/es/lib/isEmail but the es folder doesn't exist in the package. changed it to validator/lib/isEmail which actually works.

fixes #2528

let me know if you need any changes!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (9fa1e3a) to head (a881783).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2685   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       114           
  Lines         2595      2595           
  Branches       659       659           
=========================================
  Hits          2595      2595           

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[zamadye]

tried adding tests but having issues. could you give more details?

[WikiRik]

#2528 (comment)

From the issue it seems that extensions are the reason why the es might not work for some people but we haven't looked into it fully. It would be nice to have a proper test harness for that