docs: add saif7159 as a contributor for code (#2550)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -2514,6 +2514,15 @@
       "contributions": [
         "translation"
       ]
+    },
+    {
+      "login": "saif7159",
+      "name": "Saiful Haque",
+      "avatar_url": "https://avatars.githubusercontent.com/u/36008396?v=4",
+      "profile": "https://github.com/saif7159",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -10,7 +10,7 @@
 [![Coverage](https://sonarcloud.io/api/project_badges/measure?project=iluwatar_java-design-patterns&metric=coverage)](https://sonarcloud.io/dashboard?id=iluwatar_java-design-patterns)
 [![Join the chat at https://gitter.im/iluwatar/java-design-patterns](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/iluwatar/java-design-patterns?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-276-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-277-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 <br/>
@@ -430,6 +430,7 @@ This project is licensed under the terms of the MIT license.
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/boscha1"><img src="https://avatars.githubusercontent.com/u/55814237?v=4?s=100" width="100px;" alt="Anthony Bosch"/><br /><sub><b>Anthony Bosch</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=boscha1" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/AnsonTran"><img src="https://avatars.githubusercontent.com/u/37683428?v=4?s=100" width="100px;" alt="trananso"/><br /><sub><b>trananso</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=AnsonTran" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/beef-e"><img src="https://avatars.githubusercontent.com/u/102854627?v=4?s=100" width="100px;" alt="Giammaria Biffi"/><br /><sub><b>Giammaria Biffi</b></sub></a><br /><a href="#translation-beef-e" title="Translation">🌍</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/saif7159"><img src="https://avatars.githubusercontent.com/u/36008396?v=4?s=100" width="100px;" alt="Saiful Haque"/><br /><sub><b>Saiful Haque</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=saif7159" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>