fix(path): 🐛 correct filename sanitization logic

* Adjusted the logic in `path_file_sanitize` to ensure the sanitized filename correctly appends the file suffix after the placeholder.
* This change prevents potential filename issues when handling file paths.

tidal_dl_ng/helper/path.py

@@ -487,7 +487,9 @@ def path_file_sanitize(path_file: pathlib.Path, adapt: bool = False, uniquify: b
 
     if not sanitized_filename.endswith(path_file.suffix):
         sanitized_filename = (
-            sanitized_filename[: -len(path_file.suffix)] + FILENAME_SANITIZE_PLACEHOLDER + path_file.suffix
+            sanitized_filename[: -len(path_file.suffix) - len(FILENAME_SANITIZE_PLACEHOLDER)]
+            + FILENAME_SANITIZE_PLACEHOLDER
+            + path_file.suffix
         )
 
     sanitized_path = pathlib.Path(