message: Update README to replace deprecated defaultRefreshIntervalSeconds with schedule
diff: @@ -41,7 +41,7 @@ When you have your `packages/backend/src/plugins/search.ts` file ready to make m
  ```ts
  indexBuilder.addCollator({
  - defaultRefreshIntervalSeconds: 600,
  + schedule,
  factory: StackOverflowQuestionsCollatorFactory.fromConfig(env.config, {
  logger: env.logger,
  requestParams: {
  