fix: use 'npx expo install @sentry/react-native' instead of 'yarn add @sentry/react-native'

[poeck]

Checklist

• [x] I've added an entry to CHANGELOG.md if necessary.

Why

The @sentry/react-native plugin needs to be linked in expo, so it should be installed with 'expo install' instead of 'yarn add' or 'npm i'.

How

I replaced all occurences of 'yarn add @sentry/react-native' and 'npm i @sentry/react-native' with 'expo install @sentry/react-native'.

Test Plan

Just replaced a few words in a console.warn, so what could possibly go wrong? 😉