Fix outdated links in README files

samples/webflux-websocket/README.md

@@ -1,6 +1,6 @@
 **GraphQL WebSocket Endpoint with Spring WebFlux**
 
- - Reactive [DataFetcher's](src/main/java/io/spring/sample/graphql/SampleWiring.java), for queries and subscriptions.
+ - [Data Controller](src/main/java/io/spring/sample/graphql/SampleController.java) with reactive methods for queries and subscriptions.
  - [WebFilter](src/main/java/io/spring/sample/graphql/ContextWebFilter.java) to insert Reactor `Context` and check it can be accessed in [DataRepository](src/main/java/io/spring/sample/graphql/DataRepository.java).
  - Subscription [tests](src/test/java/io/spring/sample/graphql/SubscriptionTests.java) using Reactor's `StepVerifier` to verify the stream.
  

samples/webflux-websocket/src/main/java/io/spring/sample/graphql/DataRepository.java

@@ -17,7 +17,6 @@ package io.spring.sample.graphql;
 
 import java.time.Duration;
 
-import graphql.schema.DataFetchingEnvironment;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 

samples/webmvc-http/README.md

@@ -1,7 +1,7 @@
 **GraphQL HTTP Endpoint with Spring MVC**
 
- - Spring HATEOAS [DataFetcher's](src/main/java/io/spring/sample/graphql/project/ProjectDataWiring.java) that call spring.io REST API.
- - Querydsl [DataFetcher's](src/main/java/io/spring/sample/graphql/repository/ArtifactRepositories.java) making JPA queries.
+ - [Data Controller](src/main/java/io/spring/sample/graphql/project/ProjectController.java) with Spring HATEOAS calls to spring.io.
+ - Querydsl [GraphQlRepository](src/main/java/io/spring/sample/graphql/repository/ArtifactRepositories.java) making JPA queries.
  - Use of [ThreadLocalAccessor](src/main/java/io/spring/sample/graphql/greeting/RequestAttributesAccessor.java) to propagate context to data fetchers.
  - Schema printing enabled at "/graphql/schema".
  - [Tests](src/test/java/io/spring/sample/graphql/project/MockMvcGraphQlTests.java) with `GraphQlTester` and MockMvc.