[CI] Argument should be Optional
#!/usr/local/bin/python3
import argparse
from pathlib import Path
-from typing import List
+from typing import List, Optional
from build_utils import run_and_check
from build_userspace_headers import generate_meson_cross_file_if_necessary, copy_userspace_headers
-def build_meson_projects(only_build: List[str]) -> None:
+def build_meson_projects(only_build: Optional[List[str]] = None) -> None:
copy_userspace_headers()
programs_root = Path(__file__).parents[1] / "programs"
