Update children of https://docs.sentry.io/product/releases/setup/release-automation/

[https://docs.sentry.io/product/releases/setup/release-automation/](<https://docs.sentry.io/product/releases/setup/release-automation/>)

Most of these integrations are supported OOTB, rather than through a custom path. But also, the instructions seem to be wrong, even for the custom path. 