Add a link to the CVE on mitre.org

Author: lu-zero

posts/2021-11-01-Rust-1.56.1.md

@@ -24,9 +24,10 @@ appropriate page on our website.
 ## What's in 1.56.1 stable
 
 Rust 1.56.1 introduces two new lints to mitigate the impact of a security
-concern recently disclosed, CVE-2021-42574. We recommend all users upgrade
+concern recently disclosed, [CVE-2021-42574]. We recommend all users upgrade
 immediately to ensure their codebase is not affected by the security issue.
 
 You can learn more about the security issue in [the advisory][advisory].
 
 [advisory]: https://blog.rust-lang.org/2021/11/01/cve-2021-42574.html
+[CVE-2021-42574]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42574