`cgroup` values can now be correctly displayed for threads under a parent process by using "ps -o thcgr"
Previously, the "ps" command displayed only the control group (`cgroup`) of the parent process. Consequently, `cgroup` values of the threads under a parent process were identical to the `cgroup` value of the parent process. This update introduces a new option, "thcgr", to maintain compatibility with current `cgroup` listing. When the "thcgr" option is used, the correct individual `cgroup` values are displayed for threads under the parent process.