docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -6,7 +6,7 @@
 [![Coverage](https://sonarcloud.io/api/project_badges/measure?project=iluwatar_java-design-patterns&metric=coverage)](https://sonarcloud.io/dashboard?id=iluwatar_java-design-patterns)
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 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-355-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-356-orange.svg?style=flat-square)](#contributors-)
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 <br/>
@@ -534,6 +534,7 @@ This project is licensed under the terms of the MIT license.
     </tr>
     <tr>
       <td align="center" valign="top" width="16.66%"><a href="https://github.com/jasonjyu"><img src="https://avatars.githubusercontent.com/u/10333076?v=4?s=100" width="100px;" alt="jasonjyu"/><br /><sub><b>jasonjyu</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=jasonjyu" title="Code">💻</a></td>
+      <td align="center" valign="top" width="16.66%"><a href="https://github.com/jeffmorrison"><img src="https://avatars.githubusercontent.com/u/26047158?v=4?s=100" width="100px;" alt="jeffmorrison"/><br /><sub><b>jeffmorrison</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=jeffmorrison" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>