<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Work on this issue](https://contributors.gitlab.com/manage-issue?action=work&projectId=278964&issueIid=352976) - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=352976) </details> <!--IssueSummary end--> ## Problem to solve The version of Monaco we're using for the Source Editor is more than 6 months old. There have been significant improvements to the codebase since we updated and the further we fall back, the harder it will be to update. ## Proposal Upgrade Monaco and ensure nothing breaks. ## Testing Please ensure `package-and-qa` passes in the MR.