useToken is not process alpha

### Description

useToken is not process the alpha value

### CodeSandbox/Snack link

https://codesandbox.io/s/lucid-violet-5z73uf?file=/src/components/Example.tsx

### Steps to reproduce

code is simple like this
```
const [redColor, redColorWithAlpha] = useToken("colors", [
"red.400",
"red.400:alpha.50"
]);
console.log(redColor)
console.log(redColorWithAlpha]);
//output: #f87171
//output: red.400:alpha.50 <---redColorWithAlpha is not process correctly
```

### NativeBase Version

3.4.0

### Platform

- [ ] Android
- [ ] CRA
- [ ] Expo
- [X] iOS
- [ ] Next

### Other Platform

_No response_

### Additional Information

_No response_