fix: fiddle ipc code pattern 3

[akgupta0777]

Description of Change

Closes #32867

Fixed docs and fiddle code and tested with the fiddle.

• Added missing requirement ipcMain in docs code.
• Modified event.reply to event.sender.send as reply is not a function anymore in process event.

Checklist

• npm test passes
• relevant documentation is changed or added

Release Notes

Notes: none

[welcome]

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[akgupta0777]

@erickzhao can you please review.

[jkleinsc]

Merging as CI failure unrelated to PR change.

[welcome]

Congrats on merging your first pull request! 🎉🎉🎉

[release-clerk]

No Release Notes

[trop]

I was unable to backport this PR to "18-x-y" cleanly;
you will need to perform this backport manually.

[trop]

I have automatically backported this PR to "17-x-y", please check out #33295

[akgupta0777]

Merging as CI failure unrelated to PR change.

I still want to know why CI fails what steps I missed to avoid this in future

Thanks