docs: update .all-contributorsrc [skip ci]

allcontributors[bot] · web-flow · commit a499967e4da4 · 2021-01-06T01:39:01.000Z
diff --git a/.all-contributorsrc b/.all-contributorsrc
@@ -192,7 +192,8 @@
       "contributions": [
         "doc",
         "content",
-        "example"
+        "example",
+        "code"
       ]
     }
   ],
