Update README: `DataFunctionArgs` is being deprecated

[fernandocanizo]

Hi, according to this PR from Remix, DataFunctionArgs is being deprecated, so where the README says: "Make sure your loader and action use the new declaration format:", the example should look like:

// Old ways
export const loader: LoaderFunction = async ({request}) => {}
export const action: ActionFunction = async ({request}) => {}
export const loader = async ({request}: DataFunctionArgs) => {}
export const action = async ({request}: DataFunctionArgs) => {}

// New way
export const loader = async ({request}: LoaderFunctionArgs) => {}
export const action = async ({request}: ActionFunctionArgs) => {}

Although I don't know if there's also code to be touched before editing the documentation.

[kiliman]

Thanks for the heads up!