fix(packaging): resolve repo root from script directory

bump_packaging.py

@@ -41,7 +41,7 @@ import tempfile
 import urllib.request
 from pathlib import Path
 
-ROOT = Path(__file__).resolve().parent.parent
+ROOT = Path(__file__).resolve().parent
 PYPROJECT = ROOT / "pyproject.toml"
 INIT = ROOT / "beefy_player/__init__.py"
 FLAKE = ROOT / "flake.nix"