chore(docs): update http port in README.md

Author: josephgodwinkimani

README.md

@@ -64,7 +64,7 @@ datasource db {
 
 ### Graphql Playground
 
-When the application is running, you can go to [http://localhost:3000/graphql](http://localhost:3000/graphql) to access the GraphQL Playground.  See [here](https://docs.nestjs.com/graphql/quick-start#playground) for more.
+When the application is running, you can go to [http://localhost:3000/graphql](http://localhost:3001/graphql) to access the GraphQL Playground.  See [here](https://docs.nestjs.com/graphql/quick-start#playground) for more.
 
 
 **Create a New User**