fix(example): update cron schedule format (#295)

Signed-off-by: Vigith Maurice <[email protected]>

Author: vigith

packages/pynumaflow/examples/sideinput/simple_sideinput/pipeline.yaml

@@ -9,7 +9,7 @@ spec:
         image: quay.io/numaio/numaflow-python/sideinput-example:stable
         imagePullPolicy: Always
       trigger:
-        schedule: "*/2 * * * *"
+        schedule: "0 */2 * * * *"
         # timezone: America/Los_Angeles
   vertices:
     - name: in