Update samples.schema.json

Author: jasonjoh

tests/samples.schema.json

@@ -42,24 +42,22 @@
           },
           "headers": {
             "type": "array",
-            "items": [
-              {
-                "type": "object",
-                "properties": {
-                  "name": {
-                    "type": "string"
-                  },
-                  "value": {
-                    "type": "string"
-                  }
+            "items": {
+              "type": "object",
+              "properties": {
+                "name": {
+                  "type": "string"
                 },
-                "additionalProperties": false,
-                "required": [
-                  "name",
-                  "value"
-                ]
-              }
-            ]
+                "value": {
+                  "type": "string"
+                }
+              },
+              "additionalProperties": false,
+              "required": [
+                "name",
+                "value"
+              ]
+            }
           },
           "skipTest": {
             "type": "boolean"