You could try using --skip-broken to work around the problem

报错信息：You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest

根据提示，我们移除错误的那个包就可以了。

yum -y remove httpd-2.4.6-88.el7.centos.x86_64

现在你可以继续使用yum update了。
写完咯，继续打工咯。