[ios] Updated what's new search image.

iphone/Maps/Images.xcassets/Welcome/img_whatsnew_update_search.imageset/Contents.json

@@ -2,17 +2,17 @@
   "images" : [
     {
       "idiom" : "universal",
-      "filename" : "img_whatsnew_update_search copy.png",
+      "filename" : "img_whatsnew_update_search.png",
       "scale" : "1x"
     },
     {
       "idiom" : "universal",
-      "filename" : "img_whatsnew_update_search copy@2x.png",
+      "filename" : "img_whatsnew_update_search@2x.png",
       "scale" : "2x"
     },
     {
       "idiom" : "universal",
-      "filename" : "img_whatsnew_update_search copy@3x.png",
+      "filename" : "img_whatsnew_update_search@3x.png",
       "scale" : "3x"
     }
   ],