docs: add MehrdadBabazadeh as a contributor for code, and test (pybamm-team#4316)

* docs: update all_contributors.md [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]

Diff for: .all-contributorsrc

@@ -940,6 +940,16 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "MehrdadBabazadeh",
+      "name": "Mehrdad Babazadeh",
+      "avatar_url": "https://avatars.githubusercontent.com/u/30574522?v=4",
+      "profile": "https://github.com/MehrdadBabazadeh",
+      "contributions": [
+        "code",
+        "test"
+      ]
     }
   ],
   "contributorsPerLine": 7,

Diff for: README.md

@@ -15,7 +15,7 @@
 [![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/pybamm-team/PyBaMM/badge)](https://scorecard.dev/viewer/?uri=github.com/pybamm-team/PyBaMM)
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-88-orange.svg)](#-contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-89-orange.svg)](#-contributors)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 </div>

Diff for: all_contributors.md

@@ -118,6 +118,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/santacodes"><img src="https://avatars.githubusercontent.com/u/52504160?v=4?s=100" width="100px;" alt="Santhosh"/><br /><sub><b>Santhosh</b></sub></a><br /><a href="https://github.com/pybamm-team/PyBaMM/commits?author=santacodes" title="Code">💻</a> <a href="#infra-santacodes" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/smitasahu2"><img src="https://avatars.githubusercontent.com/u/57876346?v=4?s=100" width="100px;" alt="Smita Sahu"/><br /><sub><b>Smita Sahu</b></sub></a><br /><a href="https://github.com/pybamm-team/PyBaMM/commits?author=smitasahu2" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/Ubham16"><img src="https://avatars.githubusercontent.com/u/173074476?v=4?s=100" width="100px;" alt="Ubham16"/><br /><sub><b>Ubham16</b></sub></a><br /><a href="https://github.com/pybamm-team/PyBaMM/commits?author=Ubham16" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/MehrdadBabazadeh"><img src="https://avatars.githubusercontent.com/u/30574522?v=4?s=100" width="100px;" alt="Mehrdad Babazadeh"/><br /><sub><b>Mehrdad Babazadeh</b></sub></a><br /><a href="https://github.com/pybamm-team/PyBaMM/commits?author=MehrdadBabazadeh" title="Code">💻</a> <a href="https://github.com/pybamm-team/PyBaMM/commits?author=MehrdadBabazadeh" title="Tests">⚠️</a></td>
     </tr>
   </tbody>
 </table>