Say when localization gets synchronized

Author: JohnTheCoolingFan

README.md

@@ -19,6 +19,8 @@ The localization has been migrated to Crowdin: https://crowdin.com/project/facto
 
 More info can be found here: https://github.com/dima74/factorio-mods-localization?tab=readme-ov-file#how-to-translate-using-crowdin
 
+The localization is usually synced into the git tree on saturdays, 4:30 AM UTC. An update would be released regularly to add the new localization.
+
 #### Mod compatibility
 
 I didn't do much of specialised compatibility with other mods unless specified (here or in optional dependencies).