[nautilus] README: Update to 3.32 and move to Discourse

[Carlos Soriano <csoriano src gnome org>]

commit 0e52d892a7d59a9c24b8a3690eb806f7c0aa00cb
Author: Carlos Soriano <csoriano1618+gnome gmail com>
Date:   Mon Mar 25 21:51:09 2019 +0000

    README: Update to 3.32 and move to Discourse
    
    See https://mail.gnome.org/archives/nautilus-list/2019-March/msg00000.html

 README.md | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/README.md b/README.md
index 3410edbd2..ed60a67da 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ This is [Nautilus](https://wiki.gnome.org/Apps/Nautilus), the file manager for
 GNOME.
 
 ## Supported version
-Only latest Nautilus version 3.30 as provided upstream is supported. Try out the [Flatpak 
nightly](https://wiki.gnome.org/Apps/Nightly) installation before filling issues to ensure the installation 
is reproducible and doesn't have downstream changes on it. In case you cannnot reproduce in the nightly 
installation, don't hesitate to file an issue in your distribution. This is to ensure the issue is well 
triaged and reaches the proper people.
+Only latest Nautilus version 3.32 as provided upstream is supported. Try out the [Flatpak 
nightly](https://wiki.gnome.org/Apps/Nightly) installation before filling issues to ensure the installation 
is reproducible and doesn't have downstream changes on it. In case you cannnot reproduce in the nightly 
installation, don't hesitate to file an issue in your distribution. This is to ensure the issue is well 
triaged and reaches the proper people.
 
 ## Hacking on Nautilus
 
@@ -20,10 +20,9 @@ for building GNOME apps with Flatpak and GNOME Builder.
 - [Bubblewrap](https://github.com/projectatomic/bubblewrap) installed. Used for security reasons.
 - [Tracker (including tracker-miners)](https://gitlab.gnome.org/GNOME/tracker) properly set up and with all 
features enabled. Used for fast search and metadata extraction, starred files and batch renaming.
 
-## Mailing List
+## Discourse
 
-The nautilus mailing list is nautilus-list gnome org. Read the [subscription
-information](https://mail.gnome.org/mailman/listinfo/nautilus-list) for more.
+For more informal discussion we use [GNOME Discourse](https://discourse.gnome.org/tags/nautilus) in the 
Applications category with the nautilus tag. Freel free to open a topic there.
 
 ## How to report issues