adjust release event docs

docs/docs/20-usage/15-terminiology/index.md

@@ -38,7 +38,7 @@
 - `pull_request`: A pull request event is triggered when a pull request is opened or a new commit is pushed to it.
 - `pull_request_closed`: A pull request closed event is triggered when a pull request is closed or merged.
 - `tag`: A tag event is triggered when a tag is pushed.
-- `release`: A release event is triggered when a release is created.
+- `release`: A release event is triggered when a release, pre-release or draft is created. (You can apply further filters  using [evaluate](../20-workflow-syntax.md#evaluate) with [environment variables](../50-environment.md#built-in-environment-variables).)
 - `manual`: A manual event is triggered when a user manually triggers a pipeline.
 - `cron`: A cron event is triggered when a cron job is executed.
 

docs/docs/20-usage/20-workflow-syntax.md

@@ -757,6 +757,10 @@ when:
 
 ### `event`
 
+:::warning
+Some events like the release event will be triggered for multiple actions like: releases, pre-releases and drafts. If you want to apply further filters checkout the [evaluate](#evaluate) filter and the available [environment variables](./50-environment.md#built-in-environment-variables).
+:::
+
 Execute a step if the build event is a `tag`:
 
 ```yaml
@@ -783,7 +787,7 @@ Execute a step for all build events:
 
 ```yaml
 when:
-  event: [push, pull_request, tag, deployment]
+  event: [push, pull_request, pull_request_closed, tag, deployment, release]
 ```
 
 ### `ref`