build(deps): bump @tiptap/starter-kit from 2.1.12 to 2.6.4

Bumps [@tiptap/starter-kit](https://github.com/ueberdosis/tiptap/tree/HEAD/packages/starter-kit) from 2.1.12 to 2.6.4.
- [Release notes](https://github.com/ueberdosis/tiptap/releases)
- [Changelog](https://github.com/ueberdosis/tiptap/blob/develop/packages/starter-kit/CHANGELOG.md)
- [Commits](https://github.com/ueberdosis/tiptap/commits/@tiptap/[email protected]/packages/starter-kit)

---
updated-dependencies:
- dependency-name: "@tiptap/starter-kit"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -56,7 +56,7 @@
     "@tanstack/react-query-devtools": "^4.33.0",
     "@tiptap/extension-link": "^2.1.12",
     "@tiptap/react": "^2.1.12",
-    "@tiptap/starter-kit": "^2.1.12",
+    "@tiptap/starter-kit": "^2.6.4",
     "@types/node": "^20.8.10",
     "@types/react": "^18.2.33",
     "@types/react-copy-to-clipboard": "^5.0.6",