fix(doc): fix GraphQL gateway URL

Author: ratanparai

README.md

@@ -39,7 +39,7 @@ in terminal from project's root folder. The first run can take 30 mins to 1 hour
 ### Service URLs
 
 - eSchool Frontend (Blazor) - [http://localhost:5200/](http://localhost:5200/)
-- eSchool Gateway (GraphQL) - [http://localhost:5101/graphql/](http://localhost:5102/graphql/)
+- eSchool Gateway (GraphQL) - [http://localhost:5101/graphql/](http://localhost:5101/graphql/)
 - WebStatus - [http://localhost:5107/](http://localhost:5107/)
 - Enrolling.API (REST - Swagger) - [http://localhost:5102/swagger/](http://localhost:5102/swagger/)
 - Enrolling.API (GraphQL - Banana Cake Pop) - [http://localhost:5102/graphql/](http://localhost:5102/graphql/)