fix typo

.github/SECURITY.md

@@ -4,4 +4,4 @@ We take security issues in Shoelace very seriously and appreciate your efforts t
 
 To report a security issue, email [cory@abeautifulsite.net](mailto:cory@abeautifulsite.net) and include "SHOELACE SECURITY" in the subject line.
 
-Well respond as soon as possible and keep you updated throughout the process.
+We'll respond as soon as possible and keep you updated throughout the process.