docs: add dchidell as a contributor (#1803)

* docs: update README.md

* docs: update .all-contributorsrc

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

.all-contributorsrc

@@ -437,6 +437,15 @@
       "contributions": [
         "security"
       ]
+    },
+    {
+      "login": "dchidell",
+      "name": "David Chidell",
+      "avatar_url": "https://avatars.githubusercontent.com/u/26146619?v=4",
+      "profile": "http://blog.dchidell.com",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7

README.md

@@ -221,6 +221,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   <tr>
     <td align="center"><a href="https://github.com/ThinkChaos"><img src="https://avatars.githubusercontent.com/u/4761135?v=4?s=100" width="100px;" alt=""/><br /><sub><b>ThinkChaos</b></sub></a><br /><a href="https://github.com/authelia/authelia/commits?author=ThinkChaos" title="Code">💻</a> <a href="https://github.com/authelia/authelia/commits?author=ThinkChaos" title="Documentation">📖</a> <a href="https://github.com/authelia/authelia/commits?author=ThinkChaos" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/except"><img src="https://avatars.githubusercontent.com/u/26675576?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Hasan</b></sub></a><br /><a href="#security-except" title="Security">🛡️</a></td>
+    <td align="center"><a href="http://blog.dchidell.com"><img src="https://avatars.githubusercontent.com/u/26146619?v=4?s=100" width="100px;" alt=""/><br /><sub><b>David Chidell</b></sub></a><br /><a href="https://github.com/authelia/authelia/commits?author=dchidell" title="Documentation">📖</a></td>
   </tr>
 </table>