Add changeset

Author: hsubox76

.changeset/two-bags-jog.md

@@ -0,0 +1,6 @@
+---
+'@firebase/auth': major
+'firebase': major
+---
+
+Change `getAuth()` in the React Native bundle to default to importing `AsyncStorage` from `@react-native-async-storage/async-storage` instead of from the `react-native` core package (which has recently removed it).