docs: add Dibyendu-IITKGP as a contributor for test (#606)

* docs: update README.md [skip ci]

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

* docs: update README.md [skip ci]

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

---------

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -137,7 +137,9 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/32595915?v=4",
       "profile": "https://github.com/Dibyendu-IITKGP",
       "contributions": [
-        "example"
+        "example",
+        "test",
+        "code"
       ]
     }
   ],

README.md

@@ -140,7 +140,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://www.linkedin.com/in/muhammedsogut/"><img src="https://avatars.githubusercontent.com/u/34511375?v=4?s=100" width="100px;" alt="Muhammed Nedim Sogut"/><br /><sub><b>Muhammed Nedim Sogut</b></sub></a><br /><a href="https://github.com/pybop-team/PyBOP/commits?author=muhammedsogut" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/MarkBlyth"><img src="https://avatars.githubusercontent.com/u/20501619?v=4?s=100" width="100px;" alt="MarkBlyth"/><br /><sub><b>MarkBlyth</b></sub></a><br /><a href="https://github.com/pybop-team/PyBOP/commits?author=MarkBlyth" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/f-g-r-i-m-m"><img src="https://avatars.githubusercontent.com/u/137511310?v=4?s=100" width="100px;" alt="f-g-r-i-m-m"/><br /><sub><b>f-g-r-i-m-m</b></sub></a><br /><a href="#example-f-g-r-i-m-m" title="Examples">💡</a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Dibyendu-IITKGP"><img src="https://avatars.githubusercontent.com/u/32595915?v=4?s=100" width="100px;" alt="Dibyendu-IITKGP"/><br /><sub><b>Dibyendu-IITKGP</b></sub></a><br /><a href="#example-Dibyendu-IITKGP" title="Examples">💡</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Dibyendu-IITKGP"><img src="https://avatars.githubusercontent.com/u/32595915?v=4?s=100" width="100px;" alt="Dibyendu-IITKGP"/><br /><sub><b>Dibyendu-IITKGP</b></sub></a><br /><a href="#example-Dibyendu-IITKGP" title="Examples">💡</a> <a href="https://github.com/pybop-team/PyBOP/commits?author=Dibyendu-IITKGP" title="Tests">⚠️</a> <a href="https://github.com/pybop-team/PyBOP/commits?author=Dibyendu-IITKGP" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>