Custom Loading Icon issue

[Cybearnaut]

Describe the feature / bug 📝:

the custom icons property got some problems, where the class name for loading does not match the css
which breaks the loading effect on toast.promise

example:

import { toast, Toaster } from "sonner";

// Component
<Toaster
    icons={{
      loading: <MyLoadingIcon />
    }}
/>

// Calling toast.promise function
toast.promise(myPromise, {
  loading: "Loading",
  success: "Login Successfully",
  error: "Login Fail",
});

Here is the quick fix of it
honeypaw@189ce92