docs: add walter-ind as a contributor (#137)

* docs: update README.md

* docs: update .all-contributorsrc

Author: allcontributors[bot]

.all-contributorsrc

@@ -180,6 +180,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "walter-ind",
+      "name": "walter-ind",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/52423075?v=4",
+      "profile": "https://github.com/walter-ind",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -1039,6 +1039,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://noelyoo.github.io/resume"><img src="https://avatars2.githubusercontent.com/u/25740248?v=4" width="100px;" alt="Noel Yoo"/><br /><sub><b>Noel Yoo</b></sub></a><br /><a href="https://github.com/async-library/react-async/commits?author=noelyoo" title="Tests">⚠️</a> <a href="https://github.com/async-library/react-async/commits?author=noelyoo" title="Code">💻</a> <a href="#ideas-noelyoo" title="Ideas, Planning, & Feedback">🤔</a></td>
     <td align="center"><a href="https://github.com/aratcliffe"><img src="https://avatars3.githubusercontent.com/u/491126?v=4" width="100px;" alt="Adam Ratcliffe"/><br /><sub><b>Adam Ratcliffe</b></sub></a><br /><a href="https://github.com/async-library/react-async/commits?author=aratcliffe" title="Code">💻</a></td>
     <td align="center"><a href="https://kentcdodds.com"><img src="https://avatars0.githubusercontent.com/u/1500684?v=4" width="100px;" alt="Kent C. Dodds"/><br /><sub><b>Kent C. Dodds</b></sub></a><br /><a href="https://github.com/async-library/react-async/commits?author=kentcdodds" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/walter-ind"><img src="https://avatars2.githubusercontent.com/u/52423075?v=4" width="100px;" alt="walter-ind"/><br /><sub><b>walter-ind</b></sub></a><br /><a href="https://github.com/async-library/react-async/commits?author=walter-ind" title="Documentation">📖</a></td>
   </tr>
 </table>