Fix a typo

[chenxsan]

Description

Please include a summary of the changes and be sure to follow our Contribution Guidelines.

Type of change

• Bug fix (non-breaking change which fixes an issue) closes A typo in docs #4616
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Seems a whitespace is needed to render the code part correctly:

Checklist:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.
• I ran npm run dtslint with success and extended the tests and types if necessary.
• I ran npm run test:unit with success.
• I ran npm run test:cov and my test cases cover all the lines and branches of the added code.
• I ran npm run build and tested dist/web3.min.js in a browser.
• I have tested my code on the live network.
• I have checked the Deploy Preview and it looks correct.
• I have updated the CHANGELOG.md file in the root folder.

[nazarhussain]

@chenxsan Thanks a lot for your contribution. The change seems good, I assigned some reviewers to get this approved so we can merge it.

Meanwhile I would request you to create an issue on and link your PR with that issue. Also create an entry into CHANGELOG.md file in your PR, mentioning what is fixed.