fix(editor): Fix using `option.value` as for loop key (no-changelog)

[alexgrozav]

Summary

Sentry issue.

Related Linear tickets, Github issues, and Community forum posts

https://n8nio.sentry.io/issues/6275981089/?project=4503960699273216&referrer=slack https://linear.app/n8n/issue/NODE-2451/typeerror-cannot-read-properties-of-undefined-reading-tostring

Review / Merge checklist

• [x] PR title and summary are descriptive. (conventions)
• [ ] Docs updated or follow-up ticket created.
• [ ] Tests included.
• [ ] PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)