Add AlexanderHBerger as a contributor (#1438)

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -919,6 +919,15 @@
       "contributions": [
         "bug"
       ]
+    },
+    {
+      "login": "AlexanderHBerger",
+      "name": "AlexanderHBerger",
+      "avatar_url": "https://avatars.githubusercontent.com/u/52033187?v=4",
+      "profile": "https://github.com/AlexanderHBerger",
+      "contributions": [
+        "bug"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -409,6 +409,9 @@ Thanks goes to all these people ([emoji key](https://allcontributors.org/docs/en
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/AndersDHenriksen"><img src="https://avatars.githubusercontent.com/u/14275017?v=4?s=100" width="100px;" alt="Anders Dahl Henriksen"/><br /><sub><b>Anders Dahl Henriksen</b></sub></a><br /><a href="#maintenance-AndersDHenriksen" title="Maintenance">🚧</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://e-pet.github.io/"><img src="https://avatars.githubusercontent.com/u/1774207?v=4?s=100" width="100px;" alt="Eike Petersen"/><br /><sub><b>Eike Petersen</b></sub></a><br /><a href="https://github.com/TorchIO-project/torchio/issues?q=author%3Ae-pet" title="Bug reports">🐛</a></td>
     </tr>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/AlexanderHBerger"><img src="https://avatars.githubusercontent.com/u/52033187?v=4?s=100" width="100px;" alt="AlexanderHBerger"/><br /><sub><b>AlexanderHBerger</b></sub></a><br /><a href="https://github.com/TorchIO-project/torchio/issues?q=author%3AAlexanderHBerger" title="Bug reports">🐛</a></td>
+    </tr>
   </tbody>
 </table>