Bump @octokit/rest from 18.6.0 to 19.0.4 in /extensions/ql-vscode (#1551)

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 18.6.0 to 19.0.4.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](octokit/rest.js@v18.6.0...v19.0.4)

---
updated-dependencies:
- dependency-name: "@octokit/rest"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]