chore(gatsby): Invite more people to try QUERY_ON_DEMAND (#28327)

* chore(gatsby): Invite more people to try QUERY_ON_DEMAND

* update message for flags

packages/gatsby/src/services/run-page-queries.ts

@@ -8,7 +8,7 @@ import {
 } from "../utils/show-experiment-notice"
 import { isCI } from "gatsby-core-utils"
 
-const TWO_MINUTES = 2 * 60 * 1000
+const ONE_MINUTE = 1 * 60 * 1000
 
 export async function runPageQueries({
   parentSpan,
@@ -58,11 +58,11 @@ export async function runPageQueries({
 
         If you're interested in trialing out one of these future improvements *today* which should make your local development experience faster, go ahead and run your site with QUERY_ON_DEMAND enabled.
 
-        GATSBY_EXPERIMENTAL_QUERY_ON_DEMAND=true gatsby develop
+        You can enable it by adding "flags: { QUERY_ON_DEMAND: true }" to your gatsby-config.js
 
         Please do let us know how it goes (good, bad, or otherwise) and learn more about it at https://gatsby.dev/query-on-demand-feedback
       `),
-      TWO_MINUTES
+      ONE_MINUTE
     )
   }