docs: add matiaskotlik as a contributor (starship#639)

* docs: update README.md

* docs: update .all-contributorsrc


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

Author: allcontributors[bot]

.all-contributorsrc

@@ -499,6 +499,15 @@
         "doc",
         "test"
       ]
+    },
+    {
+      "login": "matiaskotlik",
+      "name": "Matias Kotlik",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/20362627?v=4",
+      "profile": "http://matiaskotlik.github.io",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7

README.md

@@ -299,6 +299,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://weihanglo.tw"><img src="https://avatars2.githubusercontent.com/u/14314532?v=4" width="100px;" alt="Weihang Lo"/><br /><sub><b>Weihang Lo</b></sub></a><br /><a href="#translation-weihanglo" title="Translation">🌍</a></td>
     <td align="center"><a href="https://github.com/pinshan"><img src="https://avatars0.githubusercontent.com/u/7709675?v=4" width="100px;" alt="pinshan"/><br /><sub><b>pinshan</b></sub></a><br /><a href="#translation-pinshan" title="Translation">🌍</a></td>
     <td align="center"><a href="https://github.com/brianlow"><img src="https://avatars2.githubusercontent.com/u/938138?v=4" width="100px;" alt="Brian Low"/><br /><sub><b>Brian Low</b></sub></a><br /><a href="https://github.com/starship/starship/commits?author=brianlow" title="Code">💻</a> <a href="https://github.com/starship/starship/commits?author=brianlow" title="Documentation">📖</a> <a href="https://github.com/starship/starship/commits?author=brianlow" title="Tests">⚠️</a></td>
+    <td align="center"><a href="http://matiaskotlik.github.io"><img src="https://avatars2.githubusercontent.com/u/20362627?v=4" width="100px;" alt="Matias Kotlik"/><br /><sub><b>Matias Kotlik</b></sub></a><br /><a href="https://github.com/starship/starship/commits?author=matiaskotlik" title="Code">💻</a></td>
   </tr>
 </table>