Update posts/2021-11-01-cve-2021-42574.md

Author: pietroalbini

posts/2021-11-01-cve-2021-42574.md

@@ -4,7 +4,7 @@ title: "Security advisory for rustc (CVE-2021-42574)"
 author: The Rust Security Response WG
 ---
 
-> This is a ligtly edited cross-post of [the official security advisory][advisory]. The
+> This is a lightly edited cross-post of [the official security advisory][advisory]. The
 > official advisory contains a signed version with our PGP key, as well.
 
 [advisory]: https://groups.google.com/g/rustlang-security-announcements/c/bKPH8XYMvJU