fix: update SubscriptionFields to match directive values (#162)

closes: #159

Author: mjfwebb

modules/ROOT/pages/directives/schema-configuration/type-configuration.adoc

@@ -115,11 +115,11 @@ This directive is used to limit subscription operations in the library.
 [source, graphql, indent=0]
 ----
 enum SubscriptionFields {
-    CREATE
-    UPDATE
-    DELETE
-    CREATE_RELATIONSHIP
-    DELETE_RELATIONSHIP
+    CREATED
+    UPDATED
+    DELETED
+    RELATIONSHIP_CREATED
+    RELATIONSHIP_DELETED
 }
 
 directive @subscription(events: [SubscriptionFields!]! = [CREATED, UPDATED, DELETED, RELATIONSHIP_CREATED, RELATIONSHIP_DELETED]) on OBJECT | SCHEMA
@@ -210,4 +210,4 @@ This way, instead of the wrongly generated `teches`, the type is properly writte
 ----
 
 The same is applied to other operations such as `createTechs`. 
-However, keep in mind that database labels are not changed with this directive.
+However, keep in mind that database labels are not changed with this directive.