2023-08-16 Amplify JS release - aws-amplify@5.3.8

What's Changed

• fix(core): fail to clean up framework observers by @HuiSF in #11782
• chore: update xcode version to 13.4.1 by @ashwinkumar6 in #11768
• feat: pipe auth user agent details through to service call by @erinleigh90 in #11755
• chore: fix actions amplify-js build caching by @ashwinkumar6 in #11769
• feat: capture PubSub metrics on cross-category auth calls by @erinleigh90 in #11803
• fix: only register auth urlListener from InternalAuth instance by @erinleigh90 in #11810
• release(required): Amplify JS release by @kvramyasri7 in #11811

Full Changelog: https://github.com/aws-amplify/amplify-js/compare/aws-amplify@5.3.7...aws-amplify@5.3.8