refactor: keep the bundled names out of listed

The bundled line reused the name of the str that holds the Core files
hint for a list. mypy reports it against the baseline.

scripts/verify.py

@@ -1926,10 +1926,10 @@ def _print_undeclared_section(result: dict, verbose: bool) -> None:
         # The required firmware alone read as the whole count: 14 names
         # for 154 entries, nothing saying the rest existed.
         hidden = len({u["name"] for u in bundled}) - len(named)
-        listed = named + ([f"{hidden} more, --verbose lists them"] if hidden else [])
+        items = named + ([f"{hidden} more, --verbose lists them"] if hidden else [])
         print(
             f"  Bundled with their emulator, not collected: {len(bundled)}"
-            + (f" ({', '.join(listed)})" if listed else "")
+            + (f" ({', '.join(items)})" if items else "")
         )
     if unplaced:
         print(f"  Core files held but not packed: {len(unplaced)} "