[chore] #204: 버전 코드 18로 업데이트

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Ojongseok

build-logic/src/main/java/com/neki/android/buildlogic/const/BuildConst.kt

@@ -5,7 +5,7 @@ import org.gradle.api.JavaVersion
 object BuildConst {
     const val APPLICATION_ID = "com.neki.android"
 
-    const val VERSION_CODE = 17
+    const val VERSION_CODE = 18
     const val VERSION_NAME = "1.2.0"
 
     const val MIN_SDK = 29