fix: Locale ignored if precision is set #373

Summary

When the precision option is used, the localization is broken.

Reproduction

1. filesize(1234, { locale: "sv", precision: 2 })

Expected Behavior

1,2 kB

Actual Behavior

1.2 kB

Environment

• Node.js version: 24.16.0
• OS: Ubuntu 26.04
• filesize.js version: 11.0.26

Code Sample

filesize(1234, { locale: "sv", precision: 2 })

Additional Context