问python3不会通过‘won’命令更新到3.9.1

EN

kali@kali:~$ python3 --version
Python 3.9.0
kali@kali:~$ uname -a
Linux kali 5.9.0-kali4-amd64 #1 SMP Debian 5.9.11-1kali1 (2020-12-01) x86_64 GNU/Linux
kali@kali:~$ cat /etc/apt/sources.list
deb http://http.kali.org/kali kali-rolling main non-free contrib
deb-src http://http.kali.org/kali kali-rolling main non-free contrib

kali@kali:~$ sudo apt-get update
Hit:1 http://mirrors.neusoft.edu.cn/kali kali-rolling InRelease
Reading package lists... Done
kali@kali:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
kali@kali:~$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.