add comments for Apollo Server and Apollo Client>

Author: slhoehn

server/graphQL/typeDefs.js

@@ -4,7 +4,7 @@ const { gql } = require('apollo-server-express');
 // Link to defining a schema in Apollo:
 // https://www.apollographql.com/docs/apollo-server/schema/schema/
 // The schema specifies which queries and mutations are available for clients
-// to execute against your data graph.
+// to execute against your data graph
 
 const typeDefs = gql`