enchant-2: update to 2.2.12

The 2.2.12 version contains a bug fix useful for gspell:
gspell#10
11 jobs for swilmet/enchant-update in 261 minutes and 28 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Track
passed #952682
gnome-build-meta x86_64
track

00:02:39

 
  Build
passed #953039
aarch64 gnome-build-meta
build-aarch64

01:50:25

passed #952684
gnome-build-meta x86_64
build-i386

00:27:18

passed #952686
gnome-build-meta ppc64le
build-ppc64le

02:24:23

passed #952683
gnome-build-meta x86_64
build-x86_64

00:33:30

canceled #952685
gnome-build-meta aarch64
build-aarch64

02:34:48

 
  Deploy
manual #952691
gnome-build-meta x86_64 allowed to fail manual
iso-installer-x86_64
manual #952688
gnome-build-meta aarch64 allowed to fail manual
pinebook-pro-image
manual #952690
gnome-build-meta aarch64 allowed to fail manual
raspberrypi-4-image
manual #952689
gnome-build-meta aarch64 allowed to fail manual
rock64-image
manual #952687
gnome-build-meta x86_64 allowed to fail manual
vm-image-x86_64