fix misspelled url

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

@@ -191,7 +191,7 @@ can use the following setup:
 1. In Cloudflare, create a DNS `TXT` record to verify your domain.
 1. In GitLab, verify your domain.
 1. In Cloudflare, create a DNS `CNAME` record pointing `www` to `domain.com`.
-1. In Cloudflare, add a Page Rule pointing `www.domain,com` to `domain.com`:
+1. In Cloudflare, add a Page Rule pointing `www.domain.com` to `domain.com`:
     - Navigate to your domain's dashboard and click **Page Rules**
       on the top nav.
     - Click **Create Page Rule**.