fix: build.gradle tab 문자 적용

Author: dlsrks1021

backend/build.gradle

@@ -38,7 +38,7 @@ dependencies {
 	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 	testImplementation 'org.projectlombok:lombok'
 	testAnnotationProcessor 'org.projectlombok:lombok'
-    testRuntimeOnly 'com.h2database:h2'
+	testRuntimeOnly 'com.h2database:h2'
 
 	/* ETC */
 	annotationProcessor 'org.projectlombok:lombok'