refactor/Updated inncorrect repository method

src/main/java/no/ntnu/idi/stud/savingsapp/repository/GroupRepository.java

@@ -10,5 +10,5 @@ import java.util.Optional;
 @Repository
 public interface GroupRepository extends JpaRepository<Group, Long> {
 
-  Optional<Group> findBygGoals_Id(long id);
+  Optional<Group> findByGoals_Id(long id);
 }

src/main/java/no/ntnu/idi/stud/savingsapp/service/impl/GoalServiceImpl.java

@@ -115,7 +115,7 @@ public class GoalServiceImpl implements GoalService {
    */
   @Override
   public Group getGroup(Long goalId) {
-    Optional<Group> optionalGroup = groupRepository.findBygGoals_Id(goalId);
+    Optional<Group> optionalGroup = groupRepository.findByGoals_Id(goalId);
     if (optionalGroup.isPresent()) {
       return optionalGroup.get();
     } else {