docs: add asteves as a contributor for doc (#521)

* 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

@@ -112,6 +112,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "asteves",
+      "name": "Alex",
+      "avatar_url": "https://avatars.githubusercontent.com/u/24926205?v=4",
+      "profile": "http://alexstephenson.me",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -226,6 +226,7 @@ Thanks goes to these wonderful people:
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/baggiponte"><img src="https://avatars.githubusercontent.com/u/57922983?v=4?s=100" width="100px;" alt="baggiponte"/><br /><sub><b>baggiponte</b></sub></a><br /><a href="https://github.com/py-econometrics/pyfixest/commits?author=baggiponte" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/sanskriti2005"><img src="https://avatars.githubusercontent.com/u/150411024?v=4?s=100" width="100px;" alt="Sanskriti"/><br /><sub><b>Sanskriti</b></sub></a><br /><a href="#infra-sanskriti2005" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/Jayhyung"><img src="https://avatars.githubusercontent.com/u/40373774?v=4?s=100" width="100px;" alt="Jaehyung"/><br /><sub><b>Jaehyung</b></sub></a><br /><a href="https://github.com/py-econometrics/pyfixest/commits?author=Jayhyung" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://alexstephenson.me"><img src="https://avatars.githubusercontent.com/u/24926205?v=4?s=100" width="100px;" alt="Alex"/><br /><sub><b>Alex</b></sub></a><br /><a href="https://github.com/py-econometrics/pyfixest/commits?author=asteves" title="Documentation">📖</a></td>
     </tr>
   </tbody>
 </table>