docs: Elaborate on supported versions

The link to the GNOME schedule was added because of some confusion
of which versions are supported upstream. Briefly outline the
policy of "last two stable + current main", so that the information
can also be deduced from tags etc. without scrolling through the
schedule calendar.

While at it, update the link to the schedule to point to the
future release.gnome.org page.

Death to the wiki!

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3122>

diff --git a/README.md b/README.md
index 542ddd7f5f742f3654c419bc0cdf439ba03e32e1..7e32e7acedac852a78a28b00a229d118255097b0 100644 (file)
--- a/README.md
+++ b/README.md
@@ -7,12 +7,23 @@ innovative user interface concepts to provide a visually attractive and
 easy to use experience.
 
 Bugs should be reported to the GNOME [bug tracking system][bug-tracker].
-Please refer to the [*Schedule* wiki page][schedule] to see the supported versions.
 
 All interactions with the project should follow the [Code of Conduct][conduct].
 
 [conduct]: https://conduct.gnome.org/
 
+## Supported versions
+
+Upstream gnome-shell only supports the most recent stable release series,
+the previous stable release series, and the current development release
+series. Any older stable release series are no longer supported, although
+they may still receive backported security updates in long-term support
+distributions. Such support is up to the distributions, though.
+
+Please refer to the [schedule] to see when a new version will be released.
+
+[schedule]: https://release.gnome.org/calendar
+
 ## Contributing
 
 To contribute, open merge requests at https://gitlab.gnome.org/GNOME/gnome-shell.
@@ -27,5 +38,4 @@ GNOME Shell is distributed under the terms of the GNU General Public License,
 version 2 or later. See the [COPYING][license] file for details.
 
 [bug-tracker]: https://gitlab.gnome.org/GNOME/gnome-shell/issues
-[schedule]: https://wiki.gnome.org/Schedule
 [license]: COPYING