Update Node runtime version to v22

Signed-off-by: Vipul Gupta (@vipulgupta2048) <[email protected]>

Author: vipulgupta2048

package.json

@@ -3,7 +3,7 @@
   "private": true,
   "version": "6.8.1",
   "engines": {
-    "node": "^18.0.0"
+    "node": "^22.0.0"
   },
   "description": "This repo contains balenaCloud's public-facing documentation.",
   "main": "index.js",