feat!: upgrade the node version to 22 for the js-doc-fresh core package (googleapis#8977)

## Description

For the js-doc-fresh core package we are upgrading the major node
version from 18 to 22 because Node 18 is no longer being supported.

Author: danieljbruce

core/dev-packages/jsdoc-fresh/package.json

@@ -31,6 +31,6 @@
     "@jsdoc/salty": "^0.2.5"
   },
   "engines": {
-    "node": ">=18"
+    "node": ">=22"
   }
 }