ci: Schedule Crowdin to runs weekly instead of every 12 hours (#6466)

Author: validcube

.github/workflows/pull_strings.yml

@@ -2,7 +2,7 @@ name: Pull strings
 
 on:
   schedule:
-    - cron: "0 */12 * * *"
+    - cron: "0 0 * * 0"
   workflow_dispatch:
 
 jobs: