Merge branch 'ogolowinski-master-patch-65633' into 'master'

Adds deployment start to slack notification triggers doc

See merge request gitlab-org/gitlab!44858

doc/user/project/integrations/slack.md

@@ -64,7 +64,7 @@ The following triggers are available for Slack notifications:
 - **Tag push**: Triggered when a new tag is pushed to the repository.
 - **Pipeline**: Triggered when a pipeline status changes.
 - **Wiki page**: Triggered when a wiki page is created or updated.
-- **Deployment**: Triggered when a deployment finishes.
+- **Deployment**: Triggered when a deployment starts or finishes.
 - **Alert**: Triggered when a new, unique alert is recorded.
 
 ## Troubleshooting