Apply suggestions from code review

Co-authored-by: Michael Webb <28074382+mjfwebb@users.noreply.github.com>

Author: rsill-neo4j

modules/ROOT/pages/mutations/create.adoc

@@ -65,12 +65,12 @@ mutation {
 }
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-This creates a `User` with name "John Doe".
+This creates a `User` with the name "John Doe".
 The name and the autogenerated ID are returned.
 
 == Nested `create`
 
-You can create a `User` and his initial `Post` at once by executing the following:
+You can create a `User` and their initial `Post` at once by executing the following:
 
 [source, graphql, indent=0]
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