build(deps): Bump streamdown from 1.1.4 to 2.5.0

Bumps [streamdown](https://github.com/vercel/streamdown/tree/HEAD/packages/streamdown) from 1.1.4 to 2.5.0.
- [Release notes](https://github.com/vercel/streamdown/releases)
- [Changelog](https://github.com/vercel/streamdown/blob/main/packages/streamdown/CHANGELOG.md)
- [Commits](https://github.com/vercel/streamdown/commits/streamdown@2.5.0/packages/streamdown)

---
updated-dependencies:
- dependency-name: streamdown
  dependency-version: 2.5.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

apps/playground-web/package.json

@@ -44,7 +44,7 @@
     "server-only": "^0.0.1",
     "shiki": "3.12.0",
     "sonner": "2.0.6",
-    "streamdown": "^1.1.4",
+    "streamdown": "^2.5.0",
     "tailwind-merge": "^2.6.0",
     "thirdweb": "workspace:*",
     "use-debounce": "^10.0.5",