docs(toast): fix animation related documentation issues
docs(toast): fix animation related documentation issues

ng-bootstrap/ng-bootstrap,fbasso/ng-bootstrap,fbasso/ng-bootstrap,fbasso/ng-bootstrap,jnizet/ng-bootstrap,ng-bootstrap/ng-bootstrap,fbasso/ng-bootstrap,maxokorokov/core,ng-bootstrap/ng-bootstrap,ng-bootstrap/ng-bootstrap,maxokorokov/core,maxokorokov/core,maxokorokov/core,jnizet/ng-bootstrap,jnizet/ng-bootstrap,jnizet/ng-bootstrap