Fix change log for 7.11 and move entry to 7.12
The change log for 7.11 was accidentally split in
3865a1d9. Additionally, the change added
with this commit did not make it into 7.11 according to
git branch --contains
and it has not been cherry picked to 7-11-stable
so the entry is moved to 7.12.
Refs GH-5625, GH-9318.