Provide a maximum node version in package.json

As recommended here [1], since the current build for this extension
does not work with Node v18 [2], it would be good to set a maximum
node version until this gets addressed.

So we're updating `engines` here to allow for a maximum version,
which in this case is v17.0.0.

[1]: #1369 (comment)
[2]: #1373

Author: elenatanasoiu

extensions/ql-vscode/package-lock.json

@@ -14,7 +14,7 @@
   },
   "engines": {
     "vscode": "^1.59.0",
-    "node": ">=16.11.25",
+    "node": "^16.11.25",
     "npm": ">=7.20.6"
   },
   "categories": [