不久前，我尝试更新我的 Ubuntu 服务器22.04.3 LTS，但出现了以下消息。这到底是什么意思？为什么它一直卡住sosreport，我该怎么办？
Last login: Fri Oct 20 14:41:03 2023 from 192.168.***.***
***@***:~$ sudo apt upgrade
[sudo] password for ***:
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
#
# Canonical released microcode updates for both Intel (CVE-2022-40982) and AMD
# (CVE-2023-20593). ‘Unattended upgrades’ provide security updates by default.
# Ensure it remains enabled to always get all updates as they become available.
#
The following packages have been kept back:
sosreport
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.