Fix typo in commands/cache.py

Co-authored-by: Richard Si <[email protected]>

Author: duckinator

src/pip/_internal/commands/cache.py

@@ -202,7 +202,7 @@ def remove_cache_items(self, options: Values, args: list[str]) -> None:
                     file.unlink(missing_ok=True)
                 subdir.rmdir()
             except FileNotFoundError:
-                # If the file is already gone, that's fine.
+                # If the directory is already gone, that's fine.
                 pass
             logger.verbose("Removed %s", subdir)