Fix posting slack message about ratelimits (#3582)

# What this PR does

## Which issue(s) this PR fixes
https://github.com/grafana/oncall-private/issues/2374
## Checklist

- [ ] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Check reason to skip notification in Slack to avoid task perform_notification retries @Ferril ([#3562](https://github.com/grafana/oncall/pull/3562))
 - Fix alert group table columns validation @Ferril ([#3577](https://github.com/grafana/oncall/pull/3577))
+- Fix posting message about rate limit to Slack @Ferril ([#3582](https://github.com/grafana/oncall/pull/3582))
 
 ## v1.3.80 (2023-12-14)
 

engine/apps/integrations/tasks.py

@@ -169,6 +169,6 @@ def notify_about_integration_ratelimit_in_slack(organization_id, text, **kwargs)
         if slack_team_identity is not None:
             try:
                 sc = SlackClient(slack_team_identity, enable_ratelimit_retry=True)
-                sc.chat_postMessage(channel=organization.general_log_channel_id, text=text, team=slack_team_identity)
+                sc.chat_postMessage(channel=organization.general_log_channel_id, text=text)
             except SlackAPIError as e:
                 logger.warning(f"Slack exception {e} while sending message for organization {organization_id}")