Bump @tiptap/extension-subscript from 2.9.1 to 2.10.3

Bumps [@tiptap/extension-subscript](https://github.com/ueberdosis/tiptap/tree/HEAD/packages/extension-subscript) from 2.9.1 to 2.10.3.
- [Release notes](https://github.com/ueberdosis/tiptap/releases)
- [Changelog](https://github.com/ueberdosis/tiptap/blob/@tiptap/extension-subscript@2.10.3/packages/extension-subscript/CHANGELOG.md)
- [Commits](https://github.com/ueberdosis/tiptap/commits/@tiptap/extension-subscript@2.10.3/packages/extension-subscript)

---
updated-dependencies:
- dependency-name: "@tiptap/extension-subscript"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -29,7 +29,7 @@
     "@tiptap/extension-highlight": "^2.9.1",
     "@tiptap/extension-image": "^2.9.1",
     "@tiptap/extension-link": "^2.9.1",
-    "@tiptap/extension-subscript": "^2.9.1",
+    "@tiptap/extension-subscript": "^2.10.3",
     "@tiptap/extension-superscript": "^2.10.3",
     "@tiptap/extension-table": "^2.9.1",
     "@tiptap/extension-table-cell": "^2.9.1",