Decreased minZoom for Maps

[nschung28]

Resolves #3558

Changed minZoom from 9 to 8.5 on files relevant to the maps.

Before/After screenshots (if applicable)

Before:

After:

Testing instructions

1. Test maps on signUp page, Result Map, Label Map, etc..

Things to check before submitting the PR

• I've written a descriptive PR title.
• I've added/updated comments for large or confusing blocks of code.
• I've included before/after screenshots above.
• I've asked for and included translations for any user facing text that was added or modified.
• I've updated any logging. Clicks, keyboard presses, and other user interactions should be logged. If you're not sure how (or if you need to update the logging), ask Mikey. Then make sure the documentation on this wiki page is up to date for the logs you added/updated.
• I've tested on mobile (only needed for validation page).