docs: remove unknown property

Removed unknow `debug` property from GraphQLModule.
`TS2345: Argument of type '{ driver: typeof ApolloDriver; debug: boolean; playground: false; }' is not assignable to parameter of type 'ApolloDriverConfig'.`

Author: ilkinm03

content/graphql/quick-start.md

@@ -69,7 +69,6 @@ import { ApolloDriver, ApolloDriverConfig } from '@nestjs/apollo';
   imports: [
     GraphQLModule.forRoot<ApolloDriverConfig>({
       driver: ApolloDriver,
-      debug: false,
       playground: false,
     }),
   ],