Update README.md to follow Drupal standards in regards to this file

Changed the README.md file and looks better now, I'll appreciate a review (I'll give a credit).

Moving this to "Needs Review".

Merging this to the 2.0.x branch.

danrod → changed the visibility of the branch 3542766-update-readme.md-to-8x to hidden.

danrod → changed the visibility of the branch 3542766-update-readme.md-to-8x to active.

Hi @danrod,
Maintainer section doesn't have a proper format. See

Hi @ankitv18 , thanks for letting me know. I'll fix it now (for both branches).

Fixed, thanks for letting me know, gave you the credits:

- https://git.drupalcode.org/project/many_selects/-/blob/2.0.x/README.md?r...
- https://git.drupalcode.org/project/many_selects/-/blob/8.x-1.x/README.md...