Describe the bug
I was trying to append to a zip file that contained files with non-UTF-8 filenames. The zip file was created using 7-Zip on Window 10. When trying to append to the zip file, the resulting file is invalid. Different programs exhibit different behavior when trying to read/extract this file.

To Reproduce
I've attached a minimal example ó.zip, which contains a file named ó.txt (that is 0xa2, not 0xc3 0xb3, in case that ends up getting converted).
The following program creates a new zip file if it does not exist or appends to it if it does exist:

use std::{
    env,
    fs::{File, OpenOptions},
    io::copy,
    path::PathBuf,
};
use zip::{write::SimpleFileOptions, ZipWriter};

fn main() {
    let mut args = env::args().skip(1);
    let zip_path = PathBuf::from(args.next().unwrap());
    let file_path = PathBuf::from(args.next().unwrap());

    println!("Adding {file_path:?} to {zip_path:?}");

    let mut zip = {
        let appending = zip_path.exists();
        let file = OpenOptions::new()
            .create(true)
            .truncate(false)
            .read(true)
            .write(true)
            .open(zip_path)
            .unwrap();
        if appending {
            ZipWriter::new_append(file).unwrap()
        } else {
            ZipWriter::new(file)
        }
    };

    let options = SimpleFileOptions::default();
    let stripped_path = file_path.strip_prefix(file_path.parent().unwrap()).unwrap();
    zip.start_file_from_path(stripped_path, options).unwrap();
    let mut file = File::open(file_path).unwrap();
    copy(&mut file, &mut zip).unwrap();
}

Steps to reproduce the behavior:

1. Run cargo run -- ó.zip a.txt

Expected behavior
The resulting file is expected to be a valid zip file that can be read, extracted, appended to, etc. by any zip program or library.

Different programs exhibit different behavior when trying to read/extract this file:

• zip is unable to read the file. For example, trying to add another file by running the program again results in ZipWriter::new_append returning InvalidArchive("Could not find EOCD").

• Unzipping with 7-Zip gives the following error:

  Headers Error
  Warnings:
  There are some data after the end of the payload data
  

  It does, however, unzip it, but it only contains ó.txt.

• Extracting with Windows Explorer works, and the extracted files are correct.

Additional context
Everything works as expected if the file is named a.txt instead of ó.txt.