Merge pull request RT-Thread#3594 from armink/lts-v3.1.x

update change log.

Merge pull request RT-Thread#3279 from armink/fix_rbb

[DeviceDriver][IPC] Fix rbb free bug in rt_rbb_destroy.

[Kernel] code cleanup for rt_schedule

Update ChangeLog.md

Merge pull request RT-Thread#2289 from armink/lts-v3.1.x

Lts v3.1.x

Merge pull request RT-Thread#2278 from RT-Thread/v4.0_changelog

Update changelog

Update ChangeLog.md

Update ChangeLog.md

Merge pull request RT-Thread#1495 from armink/fix_apollo429

Fix apollo429

Update ChangeLog.md