Update part8a.md

'gql' was added to the typeDef variable and node fails to resolve it when you run the application.

Author: nottherealalanturing

src/content/8/en/part8a.md

@@ -283,7 +283,7 @@ let persons = [
   },
 ]
 
-const typeDefs = gql`
+const typeDefs = `
   type Person {
     name: String!
     phone: String