폰트 이름 변경

pretendard_bold -> bold
pretendard_regular -> regular
pretendard_medium -> medium
pretendard_light -> light

app/src/main/res/layout/item_day_of_week.xml

@@ -11,7 +11,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="@drawable/bg_selectable_day_of_week"
-        android:fontFamily="@font/pretendard_regular"
+        android:fontFamily="@font/regular"
         android:gravity="center"
         android:paddingHorizontal="10dp"
         android:paddingVertical="6dp"