docs: add Yeti-or as a contributor (codesandbox#1777)

* docs: update README.md

* docs: update .all-contributorsrc

Author: allcontributors[bot]

.all-contributorsrc

@@ -1130,6 +1130,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "Yeti-or",
+      "name": "Vasiliy",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1813468?v=4",
+      "profile": "https://github.com/Yeti-or",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "repoType": "github",