[releng] Remove references to $unstable from automail.py

[Michael Catanzaro <mcatanzaro src gnome org>]

commit b71f29a1b790a7cdae47133aafaae9ac37add1ad
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Thu Nov 19 00:25:13 2020 +0000

    Remove references to $unstable from automail.py
    
    Since we have abandoned even/odd versioning, we no longer have a separate unstable series. $unstable is 
no longer defined in the schedule files, so it's now being printed literally in the emails instead of 
substituted.

 tools/schedule/automail.py | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
---
diff --git a/tools/schedule/automail.py b/tools/schedule/automail.py
index 5bada8c..6fc6351 100755
--- a/tools/schedule/automail.py
+++ b/tools/schedule/automail.py
@@ -9,12 +9,8 @@ import textwrap
 
 cat_task = set(('release', 'tarball'))
 
-FOOTER = """\n\n\nFor more information about $unstable, the full schedule, the official
-module lists and the proposed module lists, please see our colorful $unstable
-page:
-   http://www.gnome.org/start/unstable
-
-For a quick overview of the GNOME schedule, please see:
+FOOTER = """\n\n\nFor more information about the schedule for GNOME $newstable,
+please see:
    https://wiki.gnome.org/Schedule
 
 Thanks,