message: docs(search): update the number of engines
diff: @@ -4,9 +4,9 @@ title: Search Engines
  description: Choosing and configuring your search engine for Backstage
  ---
  -Backstage supports 2 search engines by default, an in-memory engine called Lunr
  -and ElasticSearch. You can configure your own search engines by implementing the
  -provided interface as mentioned in the
  +Backstage supports 3 search engines by default, an in-memory engine called Lunr,
  +ElasticSearch and Postgres. You can configure your own search engines by
  +implementing the provided interface as mentioned in the
  [search backend documentation.](./getting-started.md#Backend)
  Provided search engine implementations have their own way of constructing
  