Pre-release: Update version to 0.4.0#129

liustve merged 2 commits intorelease/v0.4.xaws-observability/aws-otel-js-instrumentation:release/v0.4.xfrom

v0.4.0_releaseaws-observability/aws-otel-js-instrumentation:v0.4.0_releaseCopy head branch name to clipboard