Redirect links to new article location

[estelle]

Article has been moved; redirect links to the new location and update content to better reflect where the link goes.

[github-actions]

Preview URLs

• /en-US/docs/Mozilla/Firefox/Releases/71
• /en-US/docs/Web/CSS/aspect-ratio
• /en-US/docs/Web/Media/images

Flaws (6)

Note! 2 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Mozilla/Firefox/Releases/71
Title: Firefox 71 for Developers
Flaw count: 6

• macros:
  • /en-US/docs/Web/API/DataTransfer/mozItemCount does not exist
  • /en-US/docs/Web/API/DataTransfer/mozClearDataAt does not exist
  • /en-US/docs/Web/API/DataTransfer/mozGetDataAt does not exist
  • /en-US/docs/Web/API/DataTransfer/mozSetDataAt does not exist
  • /en-US/docs/Web/API/DataTransfer/mozTypesAt does not exist
• broken_links:
  • Can't resolve /en-US/docs/Web/JavaScript/New_in_JavaScript/1.6

(this comment was updated 2022-11-20 17:32:31.579946)

[dipikabh]

Thanks for this update, @estelle!

The fact that the title of the section we're linking to is too long made me look at the TOC of the "Multimedia: Images" page:

The title "Rendering strategy: preventing jank when loading images" can be shortened (to "Optimizing image rendering strategy") and that would affect the links updated in this PR.

It would help to redo some of the other titles to make them more succinct and parallel in construction:

## Importance of optimizing multimedia
## Optimizing image delivery --> this is not needed. Deleting this title will help move other titles up one level and avoid having h4s
## Optimizing image loading strategy --> (upgraded to h2)
### Using the optimal format --> (upgraded to h3)
### Serving the optimal size --> (upgraded to h3)
### Optimizing image download --> (upgraded to h3)
## Optimizing image rendering strategy --> (upgraded to h2, dropping jank from the title)
## Conclusion
## In this module

I realize that this is more work than what this PR originally sought to do. Let me know what you think.

[estelle]

That can be done in a different PR. This PR was just to get rid of links to a page that no longer exists.

[dipikabh]

Thanks!