build(deps): bump tinymce/tinymce from 7.9.1 to 8.1.2

Bumps [tinymce/tinymce](https://github.com/tinymce/tinymce-dist) from 7.9.1 to 8.1.2.
- [Changelog](https://github.com/tinymce/tinymce-dist/blob/master/CHANGELOG.md)
- [Commits](tinymce/tinymce-dist@7.9.1...8.1.2)

---
updated-dependencies:
- dependency-name: tinymce/tinymce
  dependency-version: 8.1.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]