Adds Dina as Core C++ contact person.

Author: adishavit

data/supporters.json

@@ -1664,6 +1664,10 @@
         {
           "name": "Michael Gopshtein",
           "twitter": "michael_gop"
+        },
+        {
+          "name": "Dina Goldshtein",
+          "email": "[email protected]"
         }
       ]
     },