fix: allow pnpm catalogs to be null (SchemaStore#4815)

Co-authored-by: danielbayley <[email protected]>

Author: MariaSolOs

src/schemas/json/pnpm-workspace.json

@@ -76,12 +76,12 @@
       "$comment": "https://pnpm.io/catalogs",
       "$ref": "#/definitions/dependency",
       "description": "Define dependency version ranges as reusable constants,\nfor later reference in package.json files.\nThis (singular) field creates a catalog named default.\n",
-      "type": "object",
+      "type": ["object", "null"],
       "minProperties": 1
     },
     "catalogs": {
       "description": "Define arbitrarily named catalogs",
-      "type": "object",
+      "type": ["object", "null"],
       "minProperties": 1,
       "additionalProperties": {
         "$ref": "#/definitions/catalog"