Upgrade Next.js and React for microfrontends examples (#1332)

### Description

<!--
✍️ Write a short summary of your work. Screenshots and videos are
welcome!
-->

### Demo URL

<!--
Provide a URL to a live deployment where we can test your PR. If a demo
isn't possible feel free to omit this section.
-->

### Type of Change

- [ ] New Example
- [ ] Example updates (Bug fixes, new features, etc.)
- [ ] Other (changes to the codebase, but not to examples)

### New Example Checklist

- [ ] 🛫 `npm run new-example` was used to create the example
- [ ] 📚 The template wasn't used but I carefuly read the [Adding a new
example](https://github.com/vercel/examples#adding-a-new-example) steps
and implemented them in the example
- [ ] 📱 Is it responsive? Are mobile and tablets considered?

Author: mknichel

microfrontends/nextjs-multi-zones/apps/docs/package.json

@@ -20,7 +20,7 @@
     "clsx": "^2.1.1",
     "flags": "^3.2.0",
     "lucide-react": "^0.473.0",
-    "next": "15.1.6",
+    "next": "15.1.9",
     "react": "19.0.0",
     "react-dom": "19.0.0",
     "tailwind-merge": "^2.6.0",

microfrontends/nextjs-multi-zones/apps/marketing/package.json

@@ -20,7 +20,7 @@
     "clsx": "^2.1.1",
     "flags": "^3.2.0",
     "lucide-react": "^0.473.0",
-    "next": "15.1.6",
+    "next": "15.1.9",
     "react": "19.0.0",
     "react-dom": "19.0.0",
     "tailwind-merge": "^2.6.0",

microfrontends/nextjs-multi-zones/pnpm-lock.yaml

@@ -17,7 +17,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "lucide-react": "^0.468.0",
-    "next": "15.1.2",
+    "next": "15.1.9",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "tailwind-merge": "^2.5.5",

microfrontends/saas-microservices/apps/dashboard/package.json

@@ -10,8 +10,8 @@
   },
   "dependencies": {
     "@vercel/microfrontends": "1.2.4",
-    "react": "^19.1.0",
-    "react-dom": "^19.1.0",
+    "react": "^19.2.1",
+    "react-dom": "^19.2.1",
     "single-spa-react": "^6.0.2"
   },
   "devDependencies": {

microfrontends/saas-microservices/pnpm-lock.yaml

@@ -11,8 +11,8 @@
   "dependencies": {
     "@vercel/microfrontends": "1.2.4",
     "@vercel/toolbar": "0.1.36",
-    "react": "^19.1.0",
-    "react-dom": "^19.1.0",
+    "react": "^19.2.1",
+    "react-dom": "^19.2.1",
     "single-spa": "^6.0.3"
   },
   "devDependencies": {