Addresses minor issues before release

[jsjoeio]

There are a couple things we need to fix before cutting a release:

• ERR SyntaxError: Unexpected token ' in JSON at position 2 at JSON.parse (<anonymous>) at Object.factory (:8080/static/out/vs/workbench/services/extensionManagement/common/webExtensionsScannerService.js:378) - false alarm. I accidentally told my e2e tests write to extensions.json
• error link daemon: spawn /Users/jp/Dev/coder/code-server/lib/linkup - it's okay. it means you need the Coder Link extension
• chore(deps): fix issues identified by audit-ci #4438
• refactor: remove coder-link stuff vscode#10
• Avoid npx for Playwright dependencies #4437
• Revert "Add linkup command to improve link functionality" #4439
• chore: update vscode #4440

[jsjoeio]

ERR SyntaxError: Unexpected token ' in JSON at position 2
    at JSON.parse (<anonymous>)
    at Object.factory (:8080/static/out/vs/workbench/services/extensionManagement/common/webExtensionsScannerService.js:378)

failing in this file webExtensionsScannerService.js at this line:

const storedWebExtensions = JSON.parse(content.value.toString());