fix: pnpm-workspace allow packages array to be empty (SchemaStore#4642)

Author: btea

src/schemas/json/pnpm-workspace.json

@@ -67,7 +67,6 @@
     "packages": {
       "description": "Workspace package paths. Glob patterns are supported",
       "type": "array",
-      "minItems": 1,
       "uniqueItems": true,
       "items": {
         "type": "string"