[Snyk] Upgrade @octokit/rest from 18.2.1 to 21.1.1#6

Dustin4444 wants to merge 1 commit intomainDustin4444/vscode-pull-request-github:mainfrom

snyk-upgrade-18fcdc573f23e2e338a235d52476fea6Dustin4444/vscode-pull-request-github:snyk-upgrade-18fcdc573f23e2e338a235d52476fea6Copy head branch name to clipboard