change required entity for DonorIsRecurring from ContributionRecur to Contact

CRM/CivirulesConditions/Contribution/DonorIsRecurring.php

@@ -102,6 +102,6 @@ class CRM_CivirulesConditions_Contribution_DonorIsRecurring extends CRM_Civirule
    * @access public
    */
   public function requiredEntities() {
-    return array('ContributionRecur');
+    return array('Contact');
   }
 }
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