docs (README): Reformat the configuration table

[goyalyashpal]

I just wanted to suggest this 😅 to prettify the source. feel free to discard if it doesn't feel good to you.

I gotta say, the diff shown here on github website is not very helpful... Anyhow, while reviewing, be sure to look at following views at least once:

• "Hide whitespace" view
• Rich diff view