Create a "tools and libraries" topic for "security" and link to it from the security page

Based on @Urigo's comment on #1820:

- https://github.com/graphql/graphql.github.io/pull/1820#pullrequestreview-2438795042

> I would also maybe take this opportunity to link from the article to sections of tools and libraries that are related to the concepts in the article?
> We can add a section call "security" under [graphql.org/community/tools-and-libraries](https://graphql.org/community/tools-and-libraries/) and link it here