Fix ScaleControl wrapping in case of parent break-word CSS (#6646)

[stroebjo]

• Fixes ScaleControl unit label (like "km") can have line break depending on parent overflow-wrap style and zoom level #6646

Depending on a parent container styling (overflow-wrap: break-word;) the unit in the scale control could be wrapped in two lines (km -> k\nm).

Adding white-space: nowrap; to the scale styling ensures it's indepdendent from any parent container styling.

Current	With PR

Launch Checklist

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• Briefly describe the changes in this PR.
• Link to related issues.
• Include before/after visuals or gifs if this PR includes visual changes.
• Write tests for all new functionality.
• Document any changes to public APIs.
• Post benchmark scores.
• Add an entry to CHANGELOG.md under the ## main section.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.14%. Comparing base (d050d9c) to head (f120edb).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6647      +/-   ##
==========================================
- Coverage   96.29%   96.14%   -0.15%     
==========================================
  Files         293      293              
  Lines       35481    35481              
  Branches     8691     8690       -1     
==========================================
- Hits        34166    34114      -52     
- Misses       1315     1367      +52     

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[HarelM]

Thanks for taking the time to report and fix this issue.
Can you please add a "before" and "after" visuals?

[stroebjo]

I updated the first comment with screenshots.

[HarelM]

Thanks!