scout: update watch reference (#24169)

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## Description

Quick fix to manually add the examples from the upstream markdown to
this downstream yaml.

https://github.com/docker/scout-cli/blob/main/docs/scout_watch.md#docker-scout-watch

We switched to upstream yaml from the md because of a formatting issue.
Will look into it and try to get back to using the upstream md as the md
and yaml have diverged over time.


https://deploy-preview-24169--docsdocker.netlify.app/reference/cli/docker/scout/watch/

## Related issues or tickets

#23921

https://docker.slack.com/archives/C04C69EM70C/p1771418602873829?thread_ts=1754573643.278429&cid=C04C69EM70C

## Reviews

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- [ ] Editorial review

Signed-off-by: Craig Osterhout <craig.osterhout@docker.com>

Author: craig-osterhout