Update README.md

[pawitp]

netlify.com no longer works.

https://answers.netlify.com/t/deprecating-automatic-com-redirects/115442/2

Closes #88

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.20%. Comparing base (d0961cb) to head (ba628ad).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #90 +/- ## ======================================= Coverage 71.20% 71.20% ======================================= Files 9 9 Lines 507 507 Branches 56 56 ======================================= Hits 361 361 Misses 145 145 Partials 1 1 ```

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