docs: Update outdated GraphiQL reference

Author: paveltiunov

docs/content/API-Reference/GraphQL-API.mdx

@@ -23,27 +23,9 @@ client. Instead inline variables directly in the query.
 
 First, ensure you're running Cube v0.28.58 or later. Then start the project
 locally in development mode, and navigate to
-`http://localhost:4000/cubejs-api/graphql` in your browser. You should see the
-GraphiQL interface:
-
-<div style="text-align: center">
-  <img
-    src="https://raw.githubusercontent.com/cube-js/cube.js/master/docs/content/API-Reference/GraphQL-API-1.png"
-    style="border: none"
-    width="80%"
-  />
-</div>
-
-If you click the 'Docs' button in the top-right, you can explore the
-introspected schema:
-
-<div style="text-align: center">
-  <img
-    src="https://raw.githubusercontent.com/cube-js/cube.js/master/docs/content/API-Reference/GraphQL-API-2.png"
-    style="border: none"
-    width="80%"
-  />
-</div>
+`http://localhost:4000/` in your browser. 
+After generating schema and running query you should see the GraphiQL interface if you click 'GraphiQL' button.
+If you click the 'Docs' button in the top-right, you can explore the introspected schema.
 
 As an example, let's use the `Orders` cube from the example eCommerce database: