docs: update .all-contributorsrc [skip ci]

.all-contributorsrc

@@ -646,6 +646,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "microhobby",
+      "name": "Matheus Castello",
+      "avatar_url": "https://avatars.githubusercontent.com/u/2633321?v=4",
+      "profile": "http://microhobby.com.br/blog",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,