fix: GitHub Actions 초기화 테스트용 코드 오류 수정

src/test/java/com/example/demo/infra/health/dao/HealthRepositoryTest.java

@@ -0,0 +1,20 @@
+package com.example.demo.infra.health.dao;
+
+import com.example.demo.infra.health.entity.User;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+class HealthRepositoryTest {
+    HealthRepository healthRepository = HealthRepository.getInstance();
+    @Test
+    void countAllResult3AfterInit(){
+        //when
+        healthRepository.addUser(new User(1L, "강연주"));
+        healthRepository.addUser(new User(2L, "정소민"));
+        healthRepository.addUser(new User(3L, "정경은"));
+
+        Integer resultInt = healthRepository.countAll();
+        //then
+        Assertions.assertThat(resultInt).isEqualTo(3);
+    }
+}