[minor] Fix typo in validation rule comments (#472)
[minor] Fix typo in validation rule comments (#472)


enaqx/graphql-js,enaqx/graphql-js,baer/graphql-js,graphql/graphql-js,jjergus/graphql-js,tgriesser/graphql-js,graphql/graphql-js,gabelevi/graphql-js,jjergus/graphql-js,tgriesser/graphql-js,gabelevi/graphql-js,graphql/graphql-js,baer/graphql-js,enaqx/graphql-js