Update content/4.auth/7.sso/1.index.md

Co-authored-by: Kevin Lewis <[email protected]>

Author: hola-soy-milk

content/4.auth/7.sso/1.index.md

@@ -29,7 +29,7 @@ Here are the configurations allowed for each one: [SSO configuration](/configura
 
 In order to use these mechanisms you need to create an application/configuration on your preferred external provider, set the environment variables to configure the external provider and optionally, set the environment variables to configure cookies.
 
-## SSO with Directus behind Proxy
+## SSO with Directus Behind a Proxy
 
 If Directus is running behind an HTTP(S) proxy, the instance might not be able to reach the configured SSO provider. In
 such a case, you may want to use the [`global-agent`](https://www.npmjs.com/package/global-agent) package, allowing you