docs: add johnnyreilly as a contributor for maintenance (#163)

* docs: update README.md

* docs: update .all-contributorsrc

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

Author: allcontributors[bot]

Diff for: .all-contributorsrc

@@ -59,7 +59,8 @@
       "contributions": [
         "bug",
         "ideas",
-        "promotion"
+        "promotion",
+        "maintenance"
       ]
     }
   ],

Diff for: README.md

@@ -96,7 +96,7 @@ Thanks! 💖
       <td align="center"><a href="https://sinchang.me"><img src="https://avatars.githubusercontent.com/u/3297859?v=4?s=100" width="100px;" alt="Jeff Wen"/><br /><sub><b>Jeff Wen</b></sub></a><br /><a href="#tool-sinchang" title="Tools">🔧</a></td>
       <td align="center"><a href="https://paulisaweso.me/"><img src="https://avatars.githubusercontent.com/u/6335792?v=4?s=100" width="100px;" alt="Paul Esch-Laurent"/><br /><sub><b>Paul Esch-Laurent</b></sub></a><br /><a href="#tool-Pinjasaur" title="Tools">🔧</a></td>
       <td align="center"><a href="https://github.com/NazCodeland"><img src="https://avatars.githubusercontent.com/u/113494366?v=4?s=100" width="100px;" alt="NazCodeland"/><br /><sub><b>NazCodeland</b></sub></a><br /><a href="#tool-NazCodeland" title="Tools">🔧</a></td>
-      <td align="center"><a href="https://blog.johnnyreilly.com/"><img src="https://avatars.githubusercontent.com/u/1010525?v=4?s=100" width="100px;" alt="John Reilly"/><br /><sub><b>John Reilly</b></sub></a><br /><a href="https://github.com/JoshuaKGoldberg/template-typescript-node-package/issues?q=author%3Ajohnnyreilly" title="Bug reports">🐛</a> <a href="#ideas-johnnyreilly" title="Ideas, Planning, & Feedback">🤔</a> <a href="#promotion-johnnyreilly" title="Promotion">📣</a></td>
+      <td align="center"><a href="https://blog.johnnyreilly.com/"><img src="https://avatars.githubusercontent.com/u/1010525?v=4?s=100" width="100px;" alt="John Reilly"/><br /><sub><b>John Reilly</b></sub></a><br /><a href="https://github.com/JoshuaKGoldberg/template-typescript-node-package/issues?q=author%3Ajohnnyreilly" title="Bug reports">🐛</a> <a href="#ideas-johnnyreilly" title="Ideas, Planning, & Feedback">🤔</a> <a href="#promotion-johnnyreilly" title="Promotion">📣</a> <a href="#maintenance-johnnyreilly" title="Maintenance">🚧</a></td>
     </tr>
   </tbody>
 </table>