refactor(course): rename package name

Author: javajigi

src/test/java/nextstep/courses/infrastruecture/CourseRepositoryTest.java renamed to src/test/java/nextstep/courses/infrastructure/CourseRepositoryTest.java

@@ -1,8 +1,7 @@
-package nextstep.courses.infrastruecture;
+package nextstep.courses.infrastructure;
 
 import nextstep.courses.domain.Course;
 import nextstep.courses.domain.CourseRepository;
-import nextstep.courses.infrastructure.JdbcCourseRepository;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.slf4j.Logger;