Added proper instructions in personal webpages (alshedivat#261)

* Added proper instructions in personal webpages

Changed "For personal and organization webpages" part, tried to be as concise as possible, in accordance with: alshedivat#209 (comment)

* Update README.md

* Update README.md

Co-authored-by: Maruan <alshedivat@users.noreply.github.com>