[8.3] Update rest-api-spec

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

Author: github-actions[bot]

output/schema/validation-errors.json

@@ -28,6 +28,18 @@
         }
       ]
     },
+    "params": {
+      "start": {
+        "type": "string",
+        "required": false,
+        "description": "The start time from where the datafeed preview should begin"
+      },
+      "end": {
+        "type": "string",
+        "required": false,
+        "description": "The end time when the datafeed preview should stop"
+      }
+    },
     "body": {
       "description": "The datafeed config and job config with which to execute the preview",
       "required": false