Update README.md

Author: YesAddFries

README.md

@@ -155,7 +155,7 @@ The `ghe-backup` and `ghe-restore` commands also have a verbose output mode
 (`-v`) that lists files as they're being transferred. It's often useful to
 enable when output is logged to a file.
 
-When restoring to an already configured GHE instance, settings and license data
+When restoring to an already configured GHE instance, settings, certificate, 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, certificate, and license data to be overwritten with the backup copy's data.