update version number for stable vscode release (#9494)

Co-authored-by: Ian Huff <[email protected]>

Author: IanMatthewHuff

package.json

@@ -27,7 +27,7 @@
         "theme": "light"
     },
     "engines": {
-        "vscode": "^1.66.0-insider"
+        "vscode": "^1.66.0"
     },
     "keywords": [
         "jupyter",