[Snyk] Security upgrade react-native from 0.20.0 to 0.69.12

[tomstrat]

Snyk has created this PR to fix 1 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• examples/SampleRN20/package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Symlink Attack SNYK-JS-TMP-11501554	131

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[cursor]

Bug: React Native CLI Path Error Post-Upgrade

The start script fails after upgrading React Native to 0.69.12 because it uses the deprecated CLI path "node_modules/react-native/local-cli/cli.js". This path was removed in React Native 0.60+ when the CLI was moved to a separate package. The script should be updated to npx react-native start.