fix: add required template settings to workflow push step tool

Author: cellomatt

.changeset/cold-gifts-jump.md

@@ -0,0 +1,5 @@
+---
+"@knocklabs/agent-toolkit": patch
+---
+
+Adds required template settings parameter to `createOrUpdatePushStepInWorkflow`

src/lib/tools/workflow-steps.ts

@@ -407,6 +407,9 @@ const createOrUpdatePushStepInWorkflow = KnockTool({
         template: {
           title: params.title,
           text_body: params.content,
+          settings: {
+            delivery_type: "content",
+          },
         } as PushTemplate,
         ref: params.stepRef ?? generateStepRef("push"),
       },