engagements/2023/jquery/README.md: Broken link to OpenJS Foundation announcement/news

[Chealer]

The README file about the jQuery engagement ends with an "Announcement / News" section.

The last link it contains points to https://openjsf.org/category/jquery, which yields a 404 Page not found error.

[hyandell]

Looks like that link used to point to a blog category: https://web.archive.org/web/20230609052311/https://openjsf.org/category/jquery/

Looking at an old blog that had that category: https://openjsf.org/blog/openssf-project-alpha-omega-invests-in-the-openjs-foundation-and-jquery the only category I see now is the Projects one ( https://openjsf.org/blog/category/Projects ), which doesn't feel useful in this context.

I think the fix here is either to remove the link, or add a note to the content and allow a web archaeologist the opportunity to use archive.org. Note that this is our README around the reports provided to us (rather than the reports themselves).

[Chealer]

I believe the link should be removed (unless a proper URL and a label explaining its relevance can be found).