Add changelog links

Author: benitav

packages/powersync-sdk-react-native/README.md

@@ -102,6 +102,10 @@ npx expo run:ios
 
 Our [SDK reference](https://docs.powersync.com/client-sdk-references/react-native-and-expo) contains everything you need to know to get started implementing PowerSync in your project.
 
+# Changelog
+
+A changelog for this SDK is available [here](https://releases.powersync.com/announcements/react-native-client-sdk).
+
 # Examples
 
 For example projects built with PowerSync and React Native, see our [Demo Apps / Example Projects](https://docs.powersync.com/resources/demo-apps-example-projects#react-native-and-expo) gallery.

packages/powersync-sdk-web/README.md

@@ -36,6 +36,10 @@ npm install @journeyapps/wa-sqlite
 
 Our [full SDK reference](https://docs.powersync.com/client-sdk-references/js-web) contains everything you need to know to get started implementing PowerSync in your project.
 
+# Changelog
+
+A changelog for this SDK is available [here](https://releases.powersync.com/announcements/powersync-js-web-client-sdk).
+
 # Examples
 
 For example projects built with PowerSync on Web, see our [Demo Apps / Example Projects](https://docs.powersync.com/resources/demo-apps-example-projects#js-web) gallery.