Slack notifies does not work well

Looks like the message format has been changed on the Slack side. 

<img width="1065" alt="image" src="https://user-images.githubusercontent.com/3684889/166948744-f220c28a-9f58-474e-b687-bf0a89ea07aa.png">

We need to test our format in the [Block Kit Builder](https://app.slack.com/block-kit-builder)