fix regression from 0.33.0

does not include a regression test for this. will do
that in a future PR

Author: rmorshea

src/client/packages/idom-client-react/src/json-patch.js

@@ -11,7 +11,7 @@ export function useJsonPatchCallback(initial) {
         // We CANNOT mutate the part of the document because React checks some
         // attributes of the model (e.g. model.attributes.style is checked for
         // identity).
-        doc.current = applyNonMutativePatch(doc, patch, false, false, true);
+        doc.current = applyNonMutativePatch(doc.current, patch, false, false, true);
       } else {
         // We CAN mutate the document here though because we know that nothing above
         // The patch `path` is changing. Thus, maintaining the identity for that section