Merge branch 'feature/chromium/prepare-changelog' into 'stable/chromium'

[Changelog] Add banner for 24.0 Chromium

See merge request frama-c/frama-c!3408

Changelog

@@ -17,6 +17,10 @@
 Open Source Release <next-release>
 ##################################
 
+###################################
+Open Source Release 24.0 (Chromium)
+###################################
+
 -   Kernel    [2021-09-02] 0-sized flexible array members only available in
               gcc_* machdeps, that now also support FAM in nested struct.
 -   Eva       [2021-07-26] Removes the maximum limit of option -eva-ilevel.