fix: when sync-docs, use date over string for xx-updated-at meta

Author: xiaoyu2er

.github/workflows/sync-docs.yml

@@ -149,8 +149,8 @@ jobs:
                     
                     # Update source-updated-at and translation-updated-at in the file
                     # Using portable sed syntax that works on both Linux and macOS
-                    perl -i -pe "s/source-updated-at: .*/source-updated-at: '$CURRENT_TIMESTAMP'/" "$DEST_LOCALE"
-                    perl -i -pe "s/translation-updated-at: .*/translation-updated-at: '$CURRENT_TIMESTAMP'/" "$DEST_LOCALE"
+                    perl -i -pe "s/source-updated-at: .*/source-updated-at: $CURRENT_TIMESTAMP/" "$DEST_LOCALE"
+                    perl -i -pe "s/translation-updated-at: .*/translation-updated-at: $CURRENT_TIMESTAMP/" "$DEST_LOCALE"
                   else
                     echo "Content changed, keeping original timestamps for translation to detect changes"
                   fi