Update dependency @types/react to v19.0.12 (#2121)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[@types/react](https://redirect.github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/react)
([source](https://redirect.github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react))
| dependencies | patch | [`19.0.10` ->
`19.0.12`](https://renovatebot.com/diffs/npm/@types%2freact/19.0.10/19.0.12)
|

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aws-ts-nextjs/demoapp/package.json

@@ -12,7 +12,7 @@
     "@aws-cdk/cloud-assembly-schema": "41.2.0",
     "@tailwindcss/postcss": "^4.0.15",
     "@types/node": "22.13.14",
-    "@types/react": "19.0.10",
+    "@types/react": "19.0.12",
     "@types/react-dom": "19.0.4",
     "autoprefixer": "10.4.20",
     "eslint": "9.21.0",