Outdated TextInput documentation for single-side border styles on multiline inputs

[fabiorodriguesroque]

Description

The React Native TextInput docs say that single-side border styles (like borderBottomColor or borderLeftWidth) don't work when multiline={true}. However, that doesn't seem to be the case anymore. I tested it in Snack (Android, iOS, and Web), and borderBottomWidth along with other single-side border styles and worked as expected with multiline={true}. It looks like this part of the documentation may be outdated.