updated docs about active relation
updated docs about active relation


cebe/jenkins-test,pana1990/yii2-redis,yiijan/yii2-redis,valinurovam/yii2-redis,liulingfree/yii2-redis,Saithiril/yii2-redis,yiisoft/yii2-redis,cebe/jenkins-test,E96/yii2-redis