branchs and branches-ignore filters are available for merge_group event

Author: muzimuzhi

docs/checks.md

@@ -1276,14 +1276,14 @@ actionlint validates the Webhook configurations:
   - Some filters are only available for specific events as explained in [the official document][specific-paths-doc]
     (see the following table).
 
-| Filter name       | Events where the filter is available          |
-|-------------------|-----------------------------------------------|
-| `paths`           | `push`, `pull_request`, `pull_request_target` |
-| `paths-ignore`    | `push`, `pull_request`, `pull_request_target` |
-| `branches`        | `push`, `pull_request`, `pull_request_target` |
-| `branches-ignore` | `push`, `pull_request`, `pull_request_target` |
-| `tags`            | `push`                                        |
-| `tags-ignore`     | `push`                                        |
+| Filter name       | Events where the filter is available                         |
+|-------------------|--------------------------------------------------------------|
+| `paths`           | `push`, `pull_request`, `pull_request_target`                |
+| `paths-ignore`    | `push`, `pull_request`, `pull_request_target`                |
+| `branches`        | `merge_group`, `push`, `pull_request`, `pull_request_target` |
+| `branches-ignore` | `merge_group`, `push`, `pull_request`, `pull_request_target` |
+| `tags`            | `push`                                                       |
+| `tags-ignore`     | `push`                                                       |
 
 The table of available Webhooks and their types are defined in [`all_webhooks.go`](../all_webhooks.go). It is generated
 by [a script][generate-webhook-events] and kept to the latest by CI workflow triggered weekly.

rule_events.go

@@ -132,6 +132,7 @@ func (rule *RuleEvents) checkWebhookEvent(event *WebhookEvent) {
 	}
 
 	// Some filters are available with specific events and exclusive
+	// - on.merge_group.<branches|branches-ignore>
 	// - on.<push|pull_request|pull_request_target>.<paths|paths-ignore>
 	// - on.push.<branches|tags|branches-ignore|tags-ignore>
 	// - on.<pull_request|pull_request_target>.<branches|branches-ignore>
@@ -146,7 +147,7 @@ func (rule *RuleEvents) checkWebhookEvent(event *WebhookEvent) {
 		event.Branches,
 		event.BranchesIgnore,
 		hook,
-		[]string{"push", "pull_request", "pull_request_target", "workflow_run"},
+		[]string{"merge_group", "push", "pull_request", "pull_request_target", "workflow_run"},
 	)
 	rule.checkExclusiveFilters(
 		event.Tags,