fix: use none as platform for printing upgrading link

[szymonrybczak]

Summary:

In #1882 there was introduced inherit platform, when using link.docs function, and when using this platform there is following check:

cli/packages/cli-tools/src/doclink.ts

Lines 68 to 73 in f1de95b

	if (platform === 'inherit') {
	assert.ok(
	_platform !== null,
	`Please report this CLI error: link.setPlatform('ios'|'android'|'none') was expected to be set before using link.${section}(${path}, 'inherit').`,
	);
	}

it fails, when there's no platform selected. When printing information about new release (we're doing this in info and start command), we can't really say what platform it is, so the solution for this is to use none as platform.

Before	After

Test Plan:

1. Clone the repository and do all the required steps from the Contributing guide
2. Create React Native app which is not using latest version e.g. npx react-native@latest init --version 0.72.2
3. Run this command:

node /path/to/react-native-cli/packages/cli/build/bin.js start

4. Link to the docs should be correctly printed.

Checklist

• Documentation is up to date to reflect these changes.
• Follows commit message convention described in CONTRIBUTING.md

[szymonrybczak]

FYI @thymikee I checked and we didn't released #1882 for 11.x, so we're safe :D

[thymikee]

Thanks! 🙌🏼