Merge pull request #31464 from yhirano55/update_guide_index

[ci skip] Update guide index for active storage

guides/source/documents.yaml

@@ -83,6 +83,10 @@
       name: Active Job Basics
       url: active_job_basics.html
       description: This guide provides you with all you need to get started creating, enqueuing, and executing background jobs.
+    -
+      name: Active Storage
+      url: active_storage_overview.html
+      description: This guide covers how to attach files to your Active Record models.
     -
       name: Testing Rails Applications
       url: testing.html