[Fixed] Pflogsumm for Postfix Monitoring on CentOS 6 - Markdown error (…

…#6977)

docs/guides/email/postfix/pflogsumm-for-postfix-monitoring-on-centos-6/index.md

@@ -19,7 +19,9 @@ Pflogsumm is a simple Perl script that monitors your [Postfix](/docs/email/postf
 
 {{% content "email-warning-shortguide" %}}
 
-## Before You Begin{{< note >}}
+## Before You Begin
+
+{{< note >}}
 This guide is written for a non-root user. Commands that require elevated privileges are prefixed with `sudo`. If you're not familiar with the `sudo` command, you can check our [Users and Groups](/docs/guides/linux-users-and-groups/) guide.
 {{< /note >}}