v1.43.1

Fixed ExternalStorageReference API vendoring panic

This patch fixes a panic that users hit when using the latest go.temporal.io/api v1.62.12 dependency with Go SDK v1.43.0

What's Changed

• Remove vendored ExternalStorageReference, use go.temporal.io/api v1.6… by @yuandrew in https://github.com/temporalio/sdk-go/pull/2349

Full Changelog: https://github.com/temporalio/sdk-go/compare/v1.43.0...v1.43.1