[gnome-user-docs] Update net-firewall-on-off.page Add notice that Gnome does not include a firewall, suggests that use

[Petr Kovář <pmkovar src gnome org>]

commit 8877d433334076b9df88419a46049ba3d8db2122
Author: Klein Kravis <kleinkravis44 outlook com>
Date:   Sat May 23 18:19:42 2020 +0000

    Update net-firewall-on-off.page
    Add notice that Gnome does not include a firewall, suggests that users contact distro level support

 gnome-help/C/net-firewall-on-off.page | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/gnome-help/C/net-firewall-on-off.page b/gnome-help/C/net-firewall-on-off.page
index 08510ee8..63632f1a 100644
--- a/gnome-help/C/net-firewall-on-off.page
+++ b/gnome-help/C/net-firewall-on-off.page
@@ -32,7 +32,9 @@
     <p>GNOME does not come with a firewall, this page needs to be revisited.</p>
   </comment>
 
-  <p>Your system should be equipped with a <em>firewall</em> that allows it to
+  <p>GNOME does not come with a firewall, for support beyond this document
+  check with your distro's support team or your organization's IT department.
+  Your computer should be equipped with a <em>firewall</em> that allows it to
   block programs from being accessed by other people on the internet or your
   network. This helps to keep your computer secure.</p>