Bump markdown-it and vsce

Bumps [markdown-it](https://github.com/markdown-it/markdown-it) to 12.3.2 and updates ancestor dependency [vsce](https://github.com/Microsoft/vsce). These dependencies need to be updated together.


Updates `markdown-it` from 10.0.0 to 12.3.2
- [Release notes](https://github.com/markdown-it/markdown-it/releases)
- [Changelog](https://github.com/markdown-it/markdown-it/blob/master/CHANGELOG.md)
- [Commits](markdown-it/markdown-it@10.0.0...12.3.2)

Updates `vsce` from 1.79.5 to 2.15.0
- [Release notes](https://github.com/Microsoft/vsce/releases)
- [Commits](microsoft/vscode-vsce@v1.79.5...v2.15.0)

---
updated-dependencies:
- dependency-name: markdown-it
  dependency-type: indirect
- dependency-name: vsce
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>