Test again with hopefully the correct syntax

Jenkinsfile

@@ -1,10 +1,13 @@
 pipeline {
-    agent {
+    agent any
-        node {
+    stages {
-            ansiblePlaybook(
+        stage('Execute playbook') {
-                playbook: 'main.yaml',
+            steps {
-                credentialsId: 'onedrop-vetinari'
+                ansiblePlaybook(
-            )
+                    playbook: 'main.yaml',
+                    credentialsId: 'onedrop-vetinari'
+                )
+            }
         }
     }
 }