[콘텐츠상세][Common] 딤 레이어 수정

app/src/main/res/drawable/card_dim_bottom_40.xml

@@ -4,7 +4,7 @@
   <gradient
     android:angle="90"
     android:endColor="#00000000"
-    android:centerColor="#33000000"
+    android:centerColor="#26000000"
     android:startColor="#66000000"
     android:type="linear" />
 </shape>