fix(analytics-react-native): pin analytics-core to avoid upgrades

[daniel-graham-amplitude]

Summary

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Note

Low Risk
Low risk package metadata change that only affects dependency resolution for @amplitude/analytics-react-native, but could impact monorepo/workspace linking and published transitive versions.

Overview
Pins @amplitude/analytics-react-native to use @amplitude/analytics-core@2.41.5 instead of workspace:*, preventing automatic core upgrades when installing/publishing the React Native SDK.

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