docker/whalesay uses deprecated image format and does not support ARM

[joebowbeer]

Describe the bug

docker/whalesay:latest was published 9 years ago and has a serious issue:

docker/whalesay#6

Failed to pull image "docker/whalesay": [DEPRECATION NOTICE] Docker Image Format v1 and Docker Image manifest version 2, schema 1 support is disabled by default and will be removed in an upcoming release.

This has been reported in argo-workflows:

argoproj/argo-workflows#13388
argoproj/argo-workflows#11858

and fixed by replacing whalesay with busybox:

argoproj/argo-workflows#13429

The argo-events repo also needs this fix. 👈

To Reproduce

1. Follow instructions in argo-events tutorials

Expected behavior
Examples work.

Environment (please complete the following information):

• Kubernetes: 1.30
• Argo: v3.5.11
• Argo Events: v1.9.2

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Message from the maintainers:

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