feat: bump workflow SDK to v0.15.2, release v0.4.0#2

intel352 merged 2 commits intomainGoCodeAlone/workflow-plugin-digitalocean:mainfrom

feat/bump-sdk-to-workflow-v0.15.2GoCodeAlone/workflow-plugin-digitalocean:feat/bump-sdk-to-workflow-v0.15.2Copy head branch name to clipboard