Bump node-addon-api in /src/1-getting-started/3_callbacks/node-addon-api

Bumps [node-addon-api](https://github.com/nodejs/node-addon-api) from 1.7.2 to 8.1.0.
- [Release notes](https://github.com/nodejs/node-addon-api/releases)
- [Changelog](https://github.com/nodejs/node-addon-api/blob/main/CHANGELOG.md)
- [Commits](nodejs/node-addon-api@1.7.2...node-addon-api-v8.1.0)

---
updated-dependencies:
- dependency-name: node-addon-api
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/1-getting-started/3_callbacks/node-addon-api/package.json

@@ -7,6 +7,6 @@
   "gypfile": true,
   "dependencies": {
     "bindings": "~1.5.0",
-    "node-addon-api": "^1.0.0"
+    "node-addon-api": "^8.1.0"
   }
 }