message: fix: change example comment to match type
diff: @@ -1210,7 +1210,7 @@ EXCLUDE_USERS_FROM_LISTS: Optional[List[str]] = None
  # list/dropdown if you do not want these dbs to show as available.
  # The available list is generated by driver installed, and some engines have multiple
  # drivers.
  -# e.g., DBS_AVAILABLE_DENYLIST: Dict[str, Set[str]] = {"databricks": ("pyhive", "pyodbc")}
  +# e.g., DBS_AVAILABLE_DENYLIST: Dict[str, Set[str]] = {"databricks": {"pyhive", "pyodbc"}}
  DBS_AVAILABLE_DENYLIST: Dict[str, Set[str]] = {}
  # This auth provider is used by background (offline) tasks that need to access
  