docs: correct linter command in Readme

[ath0mas]

Platforms affected

Docs

Motivation and Context

The command to lint described in Readme file does not follow the changes introduced in #822.

Description

Correct with "lint" NPM script like in package.json.

Testing

.

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[codecov-commenter]

Codecov Report

Merging #877 (4e71f55) into master (3274a78) will not change coverage.
The diff coverage is n/a.

❗ Current head 4e71f55 differs from pull request most recent head d68b8d0. Consider uploading reports for the commit d68b8d0 to get more accurate results

@@           Coverage Diff           @@
##           master     #877   +/-   ##
=======================================
  Coverage   91.13%   91.13%           
=======================================
  Files          45       45           
  Lines        2053     2053           
=======================================
  Hits         1871     1871           
  Misses        182      182           

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[raphinesse]

Thanks for fixing this! 🎉