Add missing comma

Author: marksparkza

tests/draft2020-12/unevaluatedItems.json

@@ -515,7 +515,7 @@
         "description": "unevaluatedItems depends on multiple nested contains",
         "schema": {
             "allOf": [
-                { "contains": { "multipleOf": 2 } }
+                { "contains": { "multipleOf": 2 } },
                 { "contains": { "multipleOf": 3 } }
             ],
             "unevaluatedItems": { "multipleOf": 5 }