Update src/fs/file.rs

Co-authored-by: Josh Triplett <[email protected]>

Author: notgull

Diff for: src/fs/file.rs

@@ -461,7 +461,7 @@ cfg_unix! {
 
         impl From<File> for OwnedFd {
             fn from(val: File) -> OwnedFd {
-                self.into_std_file()
+                self.into_std_file().into()
             }
         }
     }