python3: fix CVE-2021-23336

(From OE-Core rev: 4ae100fa8baf0f0dd6a16992644a20516b81107b)

Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>