docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -63,6 +63,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
  <td align="center"><a href="http://www.nikunjagarwal.social"><img src="https://avatars0.githubusercontent.com/u/35420775?v=4" width="100px;" alt=""/><br /><sub><b>Nikunj Agarwal</b></sub></a><br /><a href="https://github.com/ephremdeme/data-structure-and-algorithms/commits?author=nikunjagarwal321" title="Code">💻</a></td>
  <td align="center"><a href="https://github.com/Druffl3"><img src="https://avatars2.githubusercontent.com/u/28187687?v=4" width="100px;" alt=""/><br /><sub><b>Goutham R</b></sub></a><br /><a href="https://github.com/ephremdeme/data-structure-and-algorithms/commits?author=Druffl3" title="Code">💻</a></td>
  <td align="center"><a href="http://indryanto.com"><img src="https://avatars3.githubusercontent.com/u/42679071?v=4" width="100px;" alt=""/><br /><sub><b>Dhiki Indryanto</b></sub></a><br /><a href="https://github.com/ephremdeme/data-structure-and-algorithms/commits?author=gebleksengek" title="Code">💻</a></td>
+ <td align="center"><a href="https://pankajcoder1.github.io/Pankajcoder1/"><img src="https://avatars0.githubusercontent.com/u/54040417?v=4" width="100px;" alt=""/><br /><sub><b>Pankaj Kumar</b></sub></a><br /><a href="https://github.com/ephremdeme/data-structure-and-algorithms/commits?author=Pankajcoder1" title="Code">💻</a> <a href="#ideas-Pankajcoder1" title="Ideas, Planning, & Feedback">🤔</a></td>
  </tr>
 </table>