docs: add smile-ab as a contributor for code (#3209)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

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

.all-contributorsrc

@@ -3427,7 +3427,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/202159894?v=4",
       "profile": "https://github.com/smile-ab",
       "contributions": [
-        "translation"
+        "translation",
+        "code"
       ]
     }
   ],