chore(deps-dev): bump @tiptap/starter-kit from 2.1.12 to 2.1.15

Bumps [@tiptap/starter-kit](https://github.com/ueberdosis/tiptap/tree/HEAD/packages/starter-kit) from 2.1.12 to 2.1.15.
- [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/v2.1.15/packages/starter-kit)

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

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

package.json

@@ -80,7 +80,7 @@
     "@tiptap/extension-placeholder": "^2.1.12",
     "@tiptap/pm": "^2.1.12",
     "@tiptap/react": "^2.1.12",
-    "@tiptap/starter-kit": "^2.1.12",
+    "@tiptap/starter-kit": "^2.1.15",
     "@types/body-parser": "^1.19.5",
     "@types/crypto-js": "^4.2.1",
     "@types/express": "^4.17.21",