docs: add pfackeldey as a contributor for code (#3199)

* 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

@@ -456,6 +456,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "pfackeldey",
+      "name": "Peter Fackeldey",
+      "avatar_url": "https://avatars.githubusercontent.com/u/18463582?v=4",
+      "profile": "https://github.com/pfackeldey",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -226,6 +226,9 @@ Thanks especially to the gracious help of Awkward Array contributors (including
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/tcawlfield"><img src="https://avatars.githubusercontent.com/u/4094385?v=4?s=100" width="100px;" alt="Topher Cawlfield"/><br /><sub><b>Topher Cawlfield</b></sub></a><br /><a href="https://github.com/scikit-hep/awkward/commits?author=tcawlfield" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/maxgalli"><img src="https://avatars.githubusercontent.com/u/26309531?v=4?s=100" width="100px;" alt="Massimiliano Galli"/><br /><sub><b>Massimiliano Galli</b></sub></a><br /><a href="https://github.com/scikit-hep/awkward/commits?author=maxgalli" title="Code">💻</a></td>
     </tr>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/pfackeldey"><img src="https://avatars.githubusercontent.com/u/18463582?v=4?s=100" width="100px;" alt="Peter Fackeldey"/><br /><sub><b>Peter Fackeldey</b></sub></a><br /><a href="https://github.com/scikit-hep/awkward/commits?author=pfackeldey" title="Code">💻</a></td>
+    </tr>
   </tbody>
 </table>