docs: update README.md [skip ci]

allcontributors[bot] · web-flow · commit 71e067607b11 · 2020-07-28T14:43:43.000Z
diff --git a/README.md b/README.md
@@ -9,7 +9,7 @@
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 # Introduction
@@ -88,6 +88,7 @@ This project is licensed under the terms of the MIT license.
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     <td align="center"><a href="https://kemitix.github.io/"><img src="https://avatars1.githubusercontent.com/u/1147749?v=4" width="100px;" alt=""/><br /><sub><b>Paul Campbell</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=kemitix" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/Argyro-Sioziou"><img src="https://avatars0.githubusercontent.com/u/22822639?v=4" width="100px;" alt=""/><br /><sub><b>Argyro Sioziou</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=Argyro-Sioziou" title="Code">💻</a></td>
   </tr>
 </table>
 
