[lua] Save Survival Guide TP menu user choice

[sruon]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• 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?

When attempting to change the way the Survival Guide teleport menu presents options (either by region or content), the flag is always saved as 1 in char_unlocks, regardless of the selected option in the menu. This PR resolves the issue.

Steps to test these changes

Use a "Survival Guide"

• "Other Mysteries"
• "Select by region/content"

Back out of the menu, use the "Survival Guide" again and confirm it's displaying teleports according to your choice.