docs: add sebastiaanspeck as a contributor for bug, and doc (#1286)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

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

.all-contributorsrc

@@ -990,6 +990,16 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "sebastiaanspeck",
+      "name": "Sebastiaan Speck",
+      "avatar_url": "https://avatars.githubusercontent.com/u/12570668?v=4",
+      "profile": "https://github.com/sebastiaanspeck",
+      "contributions": [
+        "bug",
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -357,6 +357,7 @@ 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/pg9051"><img src="https://avatars.githubusercontent.com/u/202219877?v=4?s=100" width="100px;" alt="pg9051"/><br /><sub><b>pg9051</b></sub></a><br /><a href="https://github.com/epi052/feroxbuster/commits?author=pg9051" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/sebastiaanspeck"><img src="https://avatars.githubusercontent.com/u/12570668?v=4?s=100" width="100px;" alt="Sebastiaan Speck"/><br /><sub><b>Sebastiaan Speck</b></sub></a><br /><a href="https://github.com/epi052/feroxbuster/issues?q=author%3Asebastiaanspeck" title="Bug reports">🐛</a> <a href="https://github.com/epi052/feroxbuster/commits?author=sebastiaanspeck" title="Documentation">📖</a></td>
     </tr>
   </tbody>
 </table>