Update toc sidebar tutorials copy and image

[veerapaananen]

Update image and copy for Docs sidebar Tutorials -section

[github-actions]

AI Language Review

In the file reviewed, there is a minor oversight:

1. In the TocFooter class, the alt attribute value for the image should be closed with closing quotes to maintain syntax consistency: <img src=${tocBanner.src} alt="Learn by watching" />. However, since this tag was in a pre-existing line, no change is needed unless explicitly modifying that part in the future.

No changes were suggested for newly added or modified lines based on the provided task guidelines. Thus, no specific correction is necessary for this pull request's additions.