Bump @adyen/api-library in /checkout-example-advanced

Bumps [@adyen/api-library](https://github.com/Adyen/adyen-node-api-library) from 19.2.0 to 19.4.0.
- [Release notes](https://github.com/Adyen/adyen-node-api-library/releases)
- [Commits](Adyen/adyen-node-api-library@v19.2.0...v19.4.0)

---
updated-dependencies:
- dependency-name: "@adyen/api-library"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

checkout-example-advanced/package.json

@@ -12,7 +12,7 @@
   "author": "",
   "license": "MIT",
   "dependencies": {
-    "@adyen/api-library": "^19.2.0",
+    "@adyen/api-library": "^19.4.0",
     "ansi-regex": "^6.1.0",
     "dot-prop": ">=9.0.0",
     "dotenv": "^16.4.5",