Replace code that only works on Unix

Author: cruessler

gitoxide-core/src/repository/blame.rs

@@ -1,4 +1,4 @@
-use std::{ffi::OsStr, os::unix::ffi::OsStrExt, path::PathBuf, str::Lines};
+use std::{ffi::OsStr, path::PathBuf, str::Lines};
 
 use gix::bstr::BStr;
 
@@ -8,7 +8,7 @@ pub fn blame_file(repo: gix::Repository, file: &OsStr, out: impl std::io::Write)
     let mut resource_cache = repo.diff_resource_cache_for_tree_diff()?;
 
     let work_dir: PathBuf = repo.work_dir().expect("TODO").into();
-    let file_path: &BStr = file.as_bytes().into();
+    let file_path: &BStr = gix::path::os_str_into_bstr(file)?;
 
     let blame_entries = gix::blame::blame_file(
         &repo.objects,