Use charset of request to create the String content. (#1571)
Use charset of request to create the String content. (#1571)

Co-authored-by: Marvin Froeder <803ddf02118a9bb1e44b909fc9e0a2892c0fd41d@users.noreply.github.com>
OpenFeign/feign,OpenFeign/feign,OpenFeign/feign