add cert to -c flag description

Author: YesAddFries

README.md

@@ -95,7 +95,7 @@ download the most recent GitHub Enterprise version.
 
 ### Migrating from GitHub Enterprise v11.10.34x to v2.0, or v2.1
 
-If you are migrating from GitHub Enterprise version 11.10.34x to 2.0 or 2.1 
+If you are migrating from GitHub Enterprise version 11.10.34x to 2.0 or 2.1
 (note, migrations to versions greater than 2.1 are not officially supported),
 please see the [Migrating from GitHub Enterprise v11.10.34x][10] documentation
 in the [GitHub Enterprise System Administrator's Guide][11]. It includes
@@ -158,7 +158,7 @@ enable when output is logged to a file.
 When restoring to an already configured GHE instance, settings and license data
 are *not* restored to prevent overwriting manual configuration on the restore
 host. This behavior can be overriden by passing the `-c` argument to `ghe-restore`,
-forcing settings and license data to be overwritten with the backup copy's data.
+forcing settings, certificate, and license data to be overwritten with the backup copy's data.
 
 ### Scheduling backups