Update @types/node requirement from ^20.4.8 to ^20.8.0

Updates the requirements on [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) to permit the latest version.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -31,7 +31,7 @@
   },
   "dependencies": {
     "@iobroker/adapter-core": "^3.0.3",
-    "@types/node": "^20.4.8",
+    "@types/node": "^20.8.0",
     "@types/request": "^2.48.8",
     "axios": "^1.4.0",
     "coffeescript": "^1.12.7",