[lua] Fix ToAU 4 bug with onEventUpdate

[Nobutadas]

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• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
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• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Fixes a bug in the onEventUpdate where option = 10 was not accounted for.

Steps to test these changes

Add mission, set status, and test the event works.