Merge pull request rails#42533 from ashiksp/activestorage-audio-analyzer-guides

[ci skip]Added audio analysis info to activestorage guides.

Author: zzak

guides/source/active_storage_overview.md

@@ -674,8 +674,9 @@ Analyzing Files
 Active Storage analyzes files once they've been uploaded by queuing a job in Active Job. Analyzed files will store additional information in the metadata hash, including `analyzed: true`. You can check whether a blob has been analyzed by calling [`analyzed?`][] on it.
 
 Image analysis provides `width` and `height` attributes. Video analysis provides these, as well as `duration`, `angle`, and `display_aspect_ratio`.
+Audio analysis provides `duration` and `bit_rate` attributes.
 
-Analysis requires the `mini_magick` gem. Video analysis also requires the [FFmpeg](https://www.ffmpeg.org/) library, which you must include separately.
+Analysis requires the `mini_magick` gem. Audio/Video analysis also requires the [FFmpeg](https://www.ffmpeg.org/) library, which you must include separately.
 
 [`analyzed?`]: https://api.rubyonrails.org/classes/ActiveStorage/Blob/Analyzable.html#method-i-analyzed-3F