build(deps): bump react-dom from 19.1.2 to 19.2.1

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) from 19.1.2 to 19.2.1.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v19.2.1/packages/react-dom)

---
updated-dependencies:
- dependency-name: react-dom
  dependency-version: 19.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -9,7 +9,7 @@
     "framer-motion": "~12.23.25",
     "next": "15",
     "react": "~19.1.0",
-    "react-dom": "~19.1.0",
+    "react-dom": "~19.2.1",
     "react-responsive-embed": "~2.1.0",
     "sugar-high": "~0.9.3",
     "theme-ui": "~0.17.2"