Not allowing to have a network request more than 0.5MB

### Before opening, please confirm:

- [X] I have checked to see if my question is addressed in the [FAQ](https://github.com/aws-amplify/amplify-hosting/blob/master/FAQ.md).
- [X] I have [searched for duplicate or closed issues](https://github.com/aws-amplify/amplify-hosting/issues?q=is%3Aissue+).
- [X] I have removed any sensitive information from my code snippets and submission.

### Amplify Hosting feature

Not Applicable

### Is your feature request related to a problem? Please describe:

we are handling image upload request using amplify url where we have an image sizing upto 10 mb, is there a way we can increase the size to of the network request to 50MB?

### Describe how you'd like this feature to work


Start by reviewing the Amplify Hosting request-size behavior described in the issue and identify where the 0.5 MB limit is enforced. Confirm whether image uploads through the Amplify URL are supported, then document the required change or limitation and validate the result with a request up to the intended size.

Written by the indexing model from the issue text.