Update next pwa version in pwa example (#41386)

This PR contains changes made by updating the next-pwa to version [`5.6.0`](https://github.com/shadowwalker/next-pwa/releases/tag/5.6.0)


## Documentation / Examples

- [x] Make sure the linting passes by running `pnpm lint`
- [x] The "examples guidelines" are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)


Co-authored-by: Balázs Orbán <18369201+balazsorban44@users.noreply.github.com>

examples/progressive-web-app/next.config.js

@@ -1,10 +1,8 @@
 /** @type {import('next').NextConfig} */
-const withPWA = require('next-pwa')
-const runtimeCaching = require('next-pwa/cache')
+const withPWA = require('next-pwa')({
+  dest: 'public',
+})
 
 module.exports = withPWA({
-  pwa: {
-    dest: 'public',
-    runtimeCaching,
-  },
+  // config
 })

examples/progressive-web-app/package.json

@@ -7,9 +7,9 @@
   },
   "dependencies": {
     "next": "latest",
-    "next-pwa": "5.5.4",
-    "react": "^17.0.2",
-    "react-dom": "^17.0.2"
+    "next-pwa": "^5.6.0",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
   },
   "devDependencies": {
     "@types/node": "17.0.4",