Use 'filename*' Parameter Only for Non-ASCII File Names in Content-Disposition

[marevol]

We are proposing a change in the way we handle the 'Content-Disposition' header in file responses. Currently, the header includes both 'filename' and 'filename*' parameters for all file names. This change will make it so that the 'filename*' parameter is only used when the file name contains non-ASCII characters. This approach aligns better with the RFC 6266 standard and improves handling of file names with special characters.