docs: add buraktabn as a contributor for code (#499)

* 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

@@ -132,6 +132,15 @@
         "code",
         "doc"
       ]
+    },
+    {
+      "login": "buraktabn",
+      "name": "Burak",
+      "avatar_url": "https://avatars.githubusercontent.com/u/49204989?v=4",
+      "profile": "http://r3lab.com",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -87,6 +87,7 @@ A heartfelt thank you to all the contributors for enriching the Polkadart projec
       <td align="center" valign="top" width="14.28%"><a href="https://avive.github.io"><img src="https://avatars.githubusercontent.com/u/96002?v=4?s=100" width="100px;" alt="Aviv Eyal"/><br /><sub><b>Aviv Eyal</b></sub></a><br /><a href="https://github.com/leonardocustodio/polkadart/commits?author=avive" title="Code">💻</a> <a href="https://github.com/leonardocustodio/polkadart/issues?q=author%3Aavive" title="Bug reports">🐛</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/jpnovochadlo"><img src="https://avatars.githubusercontent.com/u/69369894?v=4?s=100" width="100px;" alt="jpnovochadlo"/><br /><sub><b>jpnovochadlo</b></sub></a><br /><a href="#business-jpnovochadlo" title="Business development">💼</a> <a href="#design-jpnovochadlo" title="Design">🎨</a> <a href="https://github.com/leonardocustodio/polkadart/commits?author=jpnovochadlo" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/tallesborges"><img src="https://avatars.githubusercontent.com/u/3486359?v=4?s=100" width="100px;" alt="Talles "/><br /><sub><b>Talles </b></sub></a><br /><a href="https://github.com/leonardocustodio/polkadart/commits?author=tallesborges" title="Code">💻</a> <a href="https://github.com/leonardocustodio/polkadart/commits?author=tallesborges" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://r3lab.com"><img src="https://avatars.githubusercontent.com/u/49204989?v=4?s=100" width="100px;" alt="Burak"/><br /><sub><b>Burak</b></sub></a><br /><a href="https://github.com/leonardocustodio/polkadart/commits?author=buraktabn" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>