build(deps): bump @tiptap/extension-underline

Bumps [@tiptap/extension-underline](https://github.com/ueberdosis/tiptap/tree/HEAD/packages/extension-underline) from 2.0.0-beta.25 to 2.0.0-beta.194.
- [Release notes](https://github.com/ueberdosis/tiptap/releases)
- [Changelog](https://github.com/ueberdosis/tiptap/blob/main/packages/extension-underline/CHANGELOG.md)
- [Commits](https://github.com/ueberdosis/tiptap/commits/v2.0.0-beta.194/packages/extension-underline)

---
updated-dependencies:
- dependency-name: "@tiptap/extension-underline"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>