Merge branch 'docs/edit-gitlab-pages-domains' into 'master'

Clarify new note for GitLab Pages

See merge request gitlab-org/gitlab-ce!32443

(cherry picked from commit 73a88ca8)

60fa909c Clarify new note for GitLab Pages

doc/user/project/pages/custom_domains_ssl_tls_certification/lets_encrypt_integration.md

@@ -22,7 +22,8 @@ See all the related issues linked from this [issue's description](https://gitlab
 for more information.
 Note: **Note:**
-Using this feature requires **2 IP addresses** to be configured to the machine.
+Using this feature requires two separate IP addresses, one for the GitLab domain
+and one GitLab Pages domain.
 ## Requirements