Fix setPixelRatio jsdocs

[wipfli]

Launch Checklist

JSDocs wants type followed by variable name in function argument documentation.

• 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.
• 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.
• Manually test the debug page.
• Suggest a changelog category: bug/feature/docs/etc. or "skip changelog".
• Add an entry inside this element for inclusion in the maplibre-gl-js changelog: <changelog></changelog>.

[github-actions]

Bundle size report:

Size Change: 0 B
Total Size Before: 194 kB
Total Size After: 194 kB

Output file	Before	After	Change
maplibre-gl.js	184 kB	184 kB	0 B
maplibre-gl.css	9.49 kB	9.49 kB	0 B

ℹ️ View Details

No major changes

[astridx]

Oops. shouldn't the script
"lint-docs": "documentation lint src/index.ts"
in package.json have checked and noted that?

[wipfli]