docs: add xelandernt as a contributor for code, and bug (#175)

* docs: update CONTRIBUTORS.md

* docs: update .all-contributorsrc

---------

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -94,6 +94,16 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "xelandernt",
+      "name": "Alex",
+      "avatar_url": "https://avatars.githubusercontent.com/u/60134319?v=4",
+      "profile": "https://github.com/xelandernt",
+      "contributions": [
+        "code",
+        "bug"
+      ]
     }
   ],
   "contributorsPerLine": 7,

CONTRIBUTORS.md

@@ -18,6 +18,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     </tr>
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/retrooper"><img src="https://avatars.githubusercontent.com/u/49798017?v=4?s=100" width="100px;" alt="retrooper"/><br /><sub><b>retrooper</b></sub></a><br /><a href="https://github.com/vivekjoshy/openskill.py/commits?author=retrooper" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/xelandernt"><img src="https://avatars.githubusercontent.com/u/60134319?v=4?s=100" width="100px;" alt="Alex"/><br /><sub><b>Alex</b></sub></a><br /><a href="https://github.com/vivekjoshy/openskill.py/commits?author=xelandernt" title="Code">💻</a> <a href="https://github.com/vivekjoshy/openskill.py/issues?q=author%3Axelandernt" title="Bug reports">🐛</a></td>
     </tr>
   </tbody>
   <tfoot>