Slack Notification version 6 (SlackNotification@6) is dependent on a Node version (10) that is end-of-life

[phil000]

We get this in Azure DevOps release pipeline.

##[warning]Task 'Slack Notification' version 6 (SlackNotification@6) is dependent on a Node version (10) that is end-of-life. Contact the extension owner for an updated version of the task. Task maintainers should review Node upgrade guidance: https://aka.ms/node-runner-guidance

Seems like there is no version after 6 to upgrade to.