Andrew Lytvynov 7ce1c6f981
.github/workflows: fix slack-action format in govulncheck.yml (#9390)
Currently slack messages for errors fail:
https://github.com/tailscale/tailscale/actions/runs/6159104272/job/16713248204

```
Error: Unexpected token
 in JSON at position 151
```

This is likely due to the line break in the text. Restructure the
message to use separate title/text and fix the slack webhook body.

Updates #cleanup

Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
2023-09-13 14:36:40 -07:00
..