Small fix for an aura-cli command (#850)

Author: rsill-neo4j

modules/ROOT/pages/aura-cli/configuration.adoc

@@ -72,7 +72,7 @@ Show the value of a selected setting:
 
 [source, shell]
 ----
-aura-cli config set SETTING\_NAME
+aura-cli config set SETTING_NAME
 ----
 
 === Set