Version 3.7.1

What's Changed

• Up to version 3.7.1 by @fmjsjx in #99
• Upgrade gradle to 8.7 by @fmjsjx in #100
• Fix javadoc error on method MultipartBody.charset() by @fmjsjx in #101
• Upgrade dependencies by @fmjsjx in #102

Full Changelog: v3.7.0...v3.7.1