Remove comma

[bxpana]

extra comma in example .json file

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit ddd8c68):

https://zksync-js-docs--pr207-nft-remove-comma-v5jkn0sm.web.app

_{(expires Tue, 04 Jan 2022 21:13:24 GMT)}

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[keriat]

:tada: This PR is included in version 2.3.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: