docs: add rosstitmarsh as a contributor for code (#3008)

* 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

@@ -1566,6 +1566,15 @@
       "contributions": [
         "bug"
       ]
+    },
+    {
+      "login": "rosstitmarsh",
+      "name": "Ross Titmarsh",
+      "avatar_url": "https://avatars.githubusercontent.com/u/23349806?v=4",
+      "profile": "https://github.com/rosstitmarsh",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -546,6 +546,7 @@ see [the contribution guide](CONTRIBUTING.rst).
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://cv.ycwu.space"><img src="https://avatars.githubusercontent.com/u/67060418?v=4?s=100" width="100px;" alt="Jerry Wu"/><br /><sub><b>Jerry Wu</b></sub></a><br /><a href="https://github.com/litestar-org/litestar/commits?author=jrycw" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/horo-fox"><img src="https://avatars.githubusercontent.com/u/143025439?v=4?s=100" width="100px;" alt="horo"/><br /><sub><b>horo</b></sub></a><br /><a href="https://github.com/litestar-org/litestar/issues?q=author%3Ahoro-fox" title="Bug reports">🐛</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/rosstitmarsh"><img src="https://avatars.githubusercontent.com/u/23349806?v=4?s=100" width="100px;" alt="Ross Titmarsh"/><br /><sub><b>Ross Titmarsh</b></sub></a><br /><a href="https://github.com/litestar-org/litestar/commits?author=rosstitmarsh" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>