docs: renovate README (#4620)

Conjunctive adverbs should be followed by a comma.

For more details, kindly refer:
https://www.aje.com/arc/editing-tip-commas-conjunctive-adverbs/

Separate out the labels into two rows

Co-authored-by: John Law <johnlaw.po@gmail.com>
Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>