Increase pin icon contrast to match search/back buttons

public/img/ic_pin.svg

@@ -5,6 +5,6 @@
   viewBox="0 0 24 24">
   <path
     fill="#000000"
-    fill-opacity="0.54"
+    fill-opacity="0.87"
     d="M16,12V4H17V2H7V4H8V12L6,14V16H11.2V22H12.8V16H18V14L16,12Z"/>
 </svg>

public/img/ic_unpin.svg

@@ -5,6 +5,6 @@
   viewBox="0 0 24 24">
   <path
     fill="#000000"
-    fill-opacity="0.54"
+    fill-opacity="0.87"
     d="M16,12V4H17V2H7V4H8V12L6,14V16H11.2V22H12.8V16H18V14L16,12M8.8,14L10,12.8V4H14V12.8L15.2,14H8.8Z" />
 </svg>