[BAEL-8930] Add missing controller annotation (#18051)

Co-authored-by: rajatgarg <[email protected]>

Author: rajat-garg

spring-boot-modules/spring-boot-swagger-2/src/main/java/com/baeldung/apifirstdevelopment/controller/AccountController.java

@@ -4,7 +4,9 @@
 import org.openapitools.model.Account;
 import org.openapitools.model.DepositRequest;
 import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
 
+@Controller
 public class AccountController implements AccountApi {
     @Override
     public ResponseEntity<Void> depositToAccount(DepositRequest depositRequest) {