update plot-schema diff

Author: Farkites

test/plot-schema.json

@@ -14841,6 +14841,12 @@
      "description": "Sets the source reference on Chart Studio Cloud for `y`.",
      "editType": "none",
      "valType": "string"
+    },
+    "zindex": {
+     "description": "Sets the layer on which this trace is displayed, relative to  other traces on the same axes. Traces with higher `zindex`  appear in front of those with lower `zindex`.",
+     "dflt": 0,
+     "editType": "calc",
+     "valType": "integer"
     }
    },
    "categories": [
@@ -47221,6 +47227,12 @@
      "description": "Sets the source reference on Chart Studio Cloud for `y`.",
      "editType": "none",
      "valType": "string"
+    },
+    "zindex": {
+     "description": "Sets the layer on which this trace is displayed, relative to  other traces on the same axes. Traces with higher `zindex`  appear in front of those with lower `zindex`.",
+     "dflt": 0,
+     "editType": "calc",
+     "valType": "integer"
     }
    },
    "categories": [