package.json: Try node 20.16

Seeing if this changes anything about our issues with some build not
working at all (dialog about imports being undefined, usually as a base
class).

Signed-off-by: Mark Yen <mark.yen@suse.com>

package.json

@@ -8,7 +8,7 @@
     "email": "containers@suse.com"
   },
   "engines": {
-    "node": "^20.17"
+    "node": "^20.16.0"
   },
   "packageManager": "yarn@1.22.21",
   "repository": {