docs: update .all-contributorsrc [skip ci]

.all-contributorsrc

@@ -1155,6 +1155,15 @@
         "code",
         "doc"
       ]
+    },
+    {
+      "login": "diondresschers",
+      "name": "diondresschers",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/3883936?v=4",
+      "profile": "https://github.com/diondresschers",
+      "contributions": [
+        "design"
+      ]
     }
   ],
   "contributorsPerLine": 7,