Pin ajv (#360)

Author: trungleduc

packages/schema/package.json

@@ -46,7 +46,7 @@
     "@jupyterlab/ui-components": "^4.0.0",
     "@lumino/coreutils": "^2.0.0",
     "@lumino/signaling": "^2.0.0",
-    "ajv": "^8.12.0",
+    "ajv": "8.14.0",
     "json-schema-to-typescript": "^10.1.5",
     "yjs": "^13.5.40"
   },