KH.yaml in countries-3.1.0

- old
+ new

@@ -18,9 +18,10 @@
   subregion: South-Eastern Asia
   world_region: APAC
   un_locode: KH
   nationality: Cambodian
   postal_code: true
+  postal_code_format: "\\d{5}"
   unofficial_names:
   - Cambodia
   - Kambodscha
   - Cambodge
   - Camboya