fix incorrect table being inserted into AI marker function

[relent0r]

Description of the proposed changes

A very small change that corrects an error in a default AI marker function that was unused until now.

Testing done on the proposed changes

Validated that the marker table is being populated and returned

Additional context

Noted by Grandpa Sawyer as he was wanting to use it for a campaign mission.

Checklist

• Changes are annotated, including comments where useful
• Changes are documented in the changelog for the next game version

Jip I haven't updated the changelog yet, not sure if you still want to do the create file with name of next version thing still or not?

[Garanas]

Jip I haven't updated the changelog yet, not sure if you still want to do the create file with name of next version thing still or not?

When it is done - but until then, the current approach will have to do 😃 !

[Garanas]

@relent0r could you add the changelog entry in the new setup? See also /changelog/snippets and then you'd need to create a ai.6118.md file, which contains just the entry that you introduced to 3810.md.