Allow for smart date RC6

mixins.yml

@@ -50,7 +50,7 @@ stages:
     - LENIENT=$(jq '.config."allow-plugins"."mglaman/composer-drupal-lenient"' composer.json)
     - if [[ "$LENIENT" == "true" ]]; then composer global config --no-plugins allow-plugins.mglaman/composer-drupal-lenient true; composer global require mglaman/composer-drupal-lenient; fi
     # Update composer audit CVEs
-    - sed -i "s/DDQG-unsupported-drupal-smart_date-4.1.0.0-RC4/DDQG-unsupported-drupal-smart_date-4.1.0.0-RC5/g" composer.json
+    - sed -i "s/DDQG-unsupported-drupal-smart_date-4.1.0.0-RC5/DDQG-unsupported-drupal-smart_date-4.1.0.0-RC6/g" composer.json
 
 .customreferences:
   LanguageFiles: []