docs(all): fix explanation about catalog classic sidebars (#17593)

remoteId: rem_01jwbtfqhbbam07z9j9m0etng6
remoteUpdateId: grupd_01k37mx2mcppgpbx7e1t87t2rx
branchName: main
commitSha: b9b6328393ebcdb365ff04ea692d70f275dd79dc
commitUrl: Redocly/redocly@b9b6328

Author: adamaltman

docs/realm/config/catalog-classic.md

@@ -226,7 +226,7 @@ You can configure multiple catalogs and set the link text, description, and filt
 
 When users click an item in the catalog, the routing behavior depends on your sidebar configuration:
 
-- **With sidebars.yaml**: The catalog routes to the first item defined in the corresponding `sidebars.yaml` file for that directory
+- **With sidebars.yaml**: The catalog routes to the first item defined in the corresponding `sidebars.yaml` file that links to that catalog item
 - **Without sidebars.yaml**: A sidebar is generated automatically from the files in the directory, and routing goes to the first file
 
 This means clicking an OpenAPI document in the catalog may not navigate directly to the API reference documentation.