chore(deps): bump @astrojs/react in /templates/astro-app

Bumps [@astrojs/react](https://github.com/withastro/astro/tree/HEAD/packages/integrations/react) from 4.4.2 to 5.0.0.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/react/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/react@5.0.0/packages/integrations/react)

---
updated-dependencies:
- dependency-name: "@astrojs/react"
  dependency-version: 5.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

templates/astro-app/package.json

@@ -13,7 +13,7 @@
     "typecheck": "astro check"
   },
   "dependencies": {
-    "@astrojs/react": "^4.4.2",
+    "@astrojs/react": "^5.0.0",
     "@tailwindcss/vite": "^4.2.1",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",