Added thread architecture documents to navigation sidebar.#14212

sbordet merged 1 commit intojetty-12.1.xjetty/jetty.project:jetty-12.1.xfrom

fix/jetty-12.1.x/add-threads-to-navigationjetty/jetty.project:fix/jetty-12.1.x/add-threads-to-navigationCopy head branch name to clipboard