Replace blacklist/whitelist in doc//push_rules/push_rules.md
URL: https://docs.gitlab.com/ee/push_rules/push_rules.html
grep -R -E 'whitelist|blacklist' doc/push_rules/push_rules.md
doc/push_rules/push_rules.md:GitLab allows you to turn on a predefined blacklist of files which won't be allowed to be
doc/push_rules/push_rules.md:[`files_blacklist.yml`](https://gitlab.com/gitlab-org/gitlab/blob/master/ee/lib/gitlab/checks/files_blacklist.yml) (make sure you are at the right branch
Also rename the file in the backend
Edited by Thong Kuah