Update getting-started.md

Author: djdefi

docs/getting-started.md

@@ -13,7 +13,7 @@
 
  2. Copy the [`backup.config-example`][3] file to `backup.config` and modify as
     necessary. The `GHE_HOSTNAME` value must be set to the primary GitHub Enterprise Server
-    host name. Additional options are available and documented in the
+    hostname. Additional options are available and documented in the
     configuration file but none are required for basic backup functionality.
 
     As the data on a High Availability replica may be in a transient state at the time of backup,