Add missing quote in README code example

[zaicevas]

As in the title ⬆️

[codecov]

Codecov Report

Merging #604 (e9e1c24) into master (9f6355b) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #604   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           47        47           
  Lines          879       879           
  Branches       330       330           
=========================================
  Hits           879       879           

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[github-actions]

🎉 This PR is included in version 13.0.7 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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