Update CONTRIBUTING.md
Small edit
@@ -130,7 +130,7 @@ To accept, please:
| Evrim Nur Celik | | Istanbul, Turkey | 2019-04-14 |
| Akhilesh Bedre | | Hyderabad, India | 2019-04-07 |
| Theodore Ravindranathh | | Chennai, India | 2019-04-13 |
-| Solomon Yakubov | | New York, New York, US | 2019-04-15 |
+| Solomon Yakubov | | New York, New York, USA | 2019-04-15 |
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