Update src/content/docs/workflows/build/events-and-parameters.mdx

Author: Oxyjun

src/content/docs/workflows/build/events-and-parameters.mdx

@@ -62,7 +62,7 @@ npx wrangler@latest workflows trigger workflows-starter '{"some":"data"}'
 
 ## TypeScript and type parameters
 
-By default, the `WorkflowEvent` passed to the `run` method of your Workflow definition has a type that conforms to the following, with `payload` (your data), `timestamp` and `instanceId` properties:
+By default, the `WorkflowEvent` passed to the `run` method of your Workflow definition has a type that conforms to the following, with `payload` (your data), `timestamp`, and `instanceId` properties:
 
 ```ts
 export type WorkflowEvent<T> = {