Add ref to deployment webhook

This seems to be undocumented but looking at the code always present: https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/data_builder/deployment.rb#L44

event_webhook_types.go

@@ -151,6 +151,7 @@ type DeploymentEvent struct {
 		SSHURL            string  `json:"ssh_url"`
 		HTTPURL           string  `json:"http_url"`
 	} `json:"project"`
+	Ref         string     `json:"ref"`
 	ShortSHA    string     `json:"short_sha"`
 	User        *EventUser `json:"user"`
 	UserURL     string     `json:"user_url"`

event_webhook_types_test.go

@@ -92,6 +92,10 @@ func TestDeploymentEventUnmarshal(t *testing.T) {
 	if event.CommitTitle != "Add new file" {
 		t.Errorf("CommitTitle is %s, want %s", event.CommitTitle, "Add new file")
 	}
+
+	if event.Ref != "1.0.0" {
+		t.Errorf("Ref is %s, want %s", event.Ref, "1.0.0")
+	}
 }
 
 func TestIssueCommentEventUnmarshal(t *testing.T) {

testdata/webhooks/deployment.json

@@ -32,5 +32,6 @@
   },
   "user_url": "http://10.126.0.2:3000/root",
   "commit_url": "http://10.126.0.2:3000/root/test-deployment-webhooks/-/commit/279484c09fbe69ededfced8c1bb6e6d24616b468",
-  "commit_title": "Add new file"
+  "commit_title": "Add new file",
+  "ref": "1.0.0"
 }