dx: add “Edit this page on GitHub” links #265#271

Shivampal157 wants to merge 2 commits intoOpenScienceLabs:mainOpenScienceLabs/opensciencelabs.github.io:mainfrom

Shivampal157:dx/edit-github-links-265Shivampal157/opensciencelabs.github.io:dx/edit-github-links-265Copy head branch name to clipboard