Website: Add Changelog link in header website & webide

• has a changelog entry

added Documentation label

assigned to @melwyn95

added 1 commit

• 9795f5c5 - Add changelog

Compare with previous version

marked the checklist item has a changelog entry as completed

A new deploy preview is available on Netlify at https://1602-93a5d8d6--ligo-webide.netlify.app, you can view the logs at https://app.netlify.com/sites/ligo-webide/deploys/6220d8d1a928f9190cf17c99

started a merge train

A new deploy preview is available on Netlify at https://1602-16fc7bdd--ligo-webide.netlify.app, you can view the logs at https://app.netlify.com/sites/ligo-webide/deploys/6220dfbc390936007c2da230

merged

mentioned in commit 502a9338