docs: add iluwatar as a contributor (iluwatar#1344)

* docs: update README.md [skip ci]

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

* docs: update README.md [skip ci]

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

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -11,7 +11,8 @@
       "avatar_url": "https://avatars1.githubusercontent.com/u/582346?v=4",
       "profile": "https://github.com/iluwatar",
       "contributions": [
-        "code"
+        "code",
+        "projectManagement"
       ]
     }
   ],

README.md

@@ -69,7 +69,7 @@ This project is licensed under the terms of the MIT license.
 <!-- markdownlint-disable -->
 <table>
   <tr>
-    <td align="center"><a href="https://github.com/iluwatar"><img src="https://avatars1.githubusercontent.com/u/582346?v=4" width="100px;" alt=""/><br /><sub><b>Ilkka Seppälä</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=iluwatar" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/iluwatar"><img src="https://avatars1.githubusercontent.com/u/582346?v=4" width="100px;" alt=""/><br /><sub><b>Ilkka Seppälä</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=iluwatar" title="Code">💻</a> <a href="#projectManagement-iluwatar" title="Project Management">📆</a></td>
   </tr>
 </table>