docs: add foosel as a contributor (#391)

* docs: update README.md

* docs: update .all-contributorsrc

.all-contributorsrc

@@ -366,6 +366,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "foosel",
+      "name": "Gina Häußge",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/83657?v=4",
+      "profile": "https://foosel.net",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -114,6 +114,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://github.com/rjbudke"><img src="https://avatars2.githubusercontent.com/u/273485?v=4" width="100px;" alt="Ryan Budke"/><br /><sub><b>Ryan Budke</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=rjbudke" title="Documentation">📖</a></td>
     <td align="center"><a href="http://kaloyan.raev.name"><img src="https://avatars2.githubusercontent.com/u/468091?v=4" width="100px;" alt="Kaloyan Raev"/><br /><sub><b>Kaloyan Raev</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=kaloyan-raev" title="Code">💻</a> <a href="https://github.com/containrrr/watchtower/commits?author=kaloyan-raev" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/sixth"><img src="https://avatars3.githubusercontent.com/u/11591445?v=4" width="100px;" alt="sixth"/><br /><sub><b>sixth</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=sixth" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://foosel.net"><img src="https://avatars0.githubusercontent.com/u/83657?v=4" width="100px;" alt="Gina Häußge"/><br /><sub><b>Gina Häußge</b></sub></a><br /><a href="https://github.com/containrrr/watchtower/commits?author=foosel" title="Code">💻</a></td>
   </tr>
 </table>