refactor: TimeUtil의 now를 toInstant로 변경한다

Author: devxb

src/main/kotlin/me/nalab/api/core/TimeUtil.kt

@@ -12,7 +12,7 @@ object TimeUtil {
 
     private var clock: Clock? = null
 
-    fun toInstant(): Instant {
+    fun now(): Instant {
         val current = if (clock != null) {
             Instant.now(clock)
         } else {

src/main/kotlin/me/nalab/api/survey/domain/feedback/Bookmark.kt

@@ -17,6 +17,6 @@ class Bookmark(
     companion object {
         private const val BOOKMARK_DEFAULT_STATE = false
 
-        fun impossible(): Bookmark = Bookmark(bookmarkedAt = TimeUtil.toInstant())
+        fun impossible(): Bookmark = Bookmark(bookmarkedAt = TimeUtil.now())
     }
 }