Merge branch 'russell/add-usage-ping-port' into 'master'

Added port required by Usage Ping

See merge request gitlab-org/gitlab!26044

doc/user/admin_area/settings/usage_statistics.md

@@ -11,7 +11,8 @@ All statistics are opt-out. You can enable/disable them in the
 **Admin Area > Settings > Metrics and profiling** section **Usage statistics**.
 
 NOTE: **Note:**
-Allow network traffic from your GitLab instance to IP address 104.196.17.203 to send usage statistics to GitLab Inc.
+Allow network traffic from your GitLab instance to IP address `104.196.17.203:443`, to send
+usage statistics to GitLab Inc.
 
 ## Version Check **(CORE ONLY)**