docs: add AddeusExMachina as a contributor for code (#2625)

* docs: update README.md [skip ci]

* docs: update .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]

Diff for: .all-contributorsrc

@@ -2632,6 +2632,16 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "AddeusExMachina",
+      "name": "Antonio Addeo",
+      "avatar_url": "https://avatars.githubusercontent.com/u/39912670?v=4",
+      "profile": "https://github.com/AddeusExMachina",
+      "contributions": [
+        "doc",
+        "code"
+      ]      
     }
   ],
   "contributorsPerLine": 7,

Diff for: README.md

@@ -447,6 +447,7 @@ This project is licensed under the terms of the MIT license.
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/sanchitbansal10"><img src="https://avatars.githubusercontent.com/u/16536741?v=4?s=100" width="100px;" alt="Sanchit Bansal"/><br /><sub><b>Sanchit Bansal</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=sanchitbansal10" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/mm-saiful6854"><img src="https://avatars.githubusercontent.com/u/48361160?v=4?s=100" width="100px;" alt="Md Saiful Islam"/><br /><sub><b>Md Saiful Islam</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=mm-saiful6854" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/AddeusExMachina"><img src="https://avatars.githubusercontent.com/u/39912670?v=4?s=100" width="100px;" alt="Antonio Addeo"/><br /><sub><b>Antonio Addeo</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=AddeusExMachina" title="Documentation">📖</a> <a href="https://github.com/iluwatar/java-design-patterns/commits?author=AddeusExMachina" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>