Bump sanitize-html from 2.3.2 to 2.12.1 in /resources/docstrap-master

Bumps [sanitize-html](https://github.com/apostrophecms/sanitize-html) from 2.3.2 to 2.12.1.
- [Changelog](https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md)
- [Commits](apostrophecms/sanitize-html@2.3.2...2.12.1)

---
updated-dependencies:
- dependency-name: sanitize-html
  dependency-type: direct:production
...

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

Author: dependabot[bot]