Does not send resolve alert

Hello team,

I have a playbook like this:
```
- triggers:
      - on_pod_crash_loop:
          restart_reason: "CrashLoopBackOff"
      actions:
      - report_crash_loop: {}
      sinks:
      - "slack"
```
The firing alert was sent to the Slack channel when the pod crashed, but after the pod was deleted, the resolve alert was not sent

Am I missing any parameters in the playbook?