fix urls and asset name typos

Description

Fixes the asset URLs for the global threat maps for the Findex project.

Changes Made

• Use URL constructor

How to Test

Already tested by building prod version locally

MR t-shirt size

• extra-small (e.g., update color scheme)
• small (e.g., add tooltip to chart)
• medium (e.g., add new static chart, add new pipeline output)
• large (e.g., initial data processing pipeline, interactive chart)

Timeline for review

• ASAP - blocker for deployment
• Today - blocker for ongoing work
• Next couple of days
• This week
• When reviewer has availability

Review Needs

Does this MR include data processing, modeling, or visualization code that will require domain review prior to release?

• Yes, and I have opened an issue to document the need for review, using the DomainReview issue template
• Yes, and a domain review issue already exists
• No

Related Issues

NA

Additional Notes

NA

Merge Request Checklists

• Code changes adhere to best practices documented in README.md
• Code has been cleaned the way Vue likes it - run npm run lint --fix
• If applicable, the need for future domain review has been documented in an issue
• Below section documents which browsers the site has been tested on:
  • Desktop/laptop
    • Chrome
    • Safari
    • Edge
    • Firefox
  • Mobile device
    • Chrome
    • Safari
    • Edge
    • Firefox