FIX #1444

[devwork260802]

Issue Description

FIX: making links more visible and legible for users by adding button for the links

Fixes #1444

Changes Made

Text to Buton for more visible and eye-catching.

• Please check if the PR fulfills these requirements

• ❗ If the PR changes a markdown document in site/, a comment was added in https://github.com/ocaml/ood/issues/52 with a link to the PR
• PR is descriptively titled and links the original issue above
• Before/after screenshots (if this is a layout change)
• Details of which platforms the change was tested on (if this is a browser-specific change)
• Context for what motivated the change (if this is a change to some content)

[Octachron]

This repo is mainly an archived version of the old version of ocaml.org, no changes are planned to this site. Were you looking for https://github.com/ocaml/ocaml.org ?