osmNames: Add missing [] for Khmer definitions

1 job for gnome-40 in 5 minutes and 8 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #1271063
flatpak
flatpak

00:05:08

 
Name Stage Failure
failed
flatpak Test
Uploading artifacts for failed job
Uploading artifacts...
WARNING: gnome-maps-git.flatpak: no matching files
WARNING: repo.tar: no matching files
WARNING: .flatpak-builder/build/gnome-maps/_flatpak_build/meson-logs/meson-log.txt: no matching files
WARNING: .flatpak-builder/build/gnome-maps/_flatpak_build/meson-logs/testlog.txt: no matching files
ERROR: No files to upload
Cleaning up file based variables
ERROR: Job failed: exit code 1