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

Bumps [@tiptap/extension-dropcursor](https://github.com/ueberdosis/tiptap/tree/HEAD/packages/extension-dropcursor) from 2.0.0-beta.28 to 2.0.0-beta.29.
- [Release notes](https://github.com/ueberdosis/tiptap/releases)
- [Changelog](https://github.com/ueberdosis/tiptap/blob/main/packages/extension-dropcursor/CHANGELOG.md)
- [Commits](https://github.com/ueberdosis/tiptap/commits/@tiptap/[email protected]/packages/extension-dropcursor)

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

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