Upgrade black version (#7089)

stdlib/symtable.pyi

@@ -37,6 +37,7 @@ class Symbol:
         def is_nonlocal(self) -> bool: ...
     else:
         def __init__(self, name: str, flags: int, namespaces: Sequence[SymbolTable] | None = ...) -> None: ...
+
     def get_name(self) -> str: ...
     def is_referenced(self) -> bool: ...
     def is_parameter(self) -> bool: ...