triagebot: Add notification of 2024 issues

Author: ehuss

triagebot.toml

@@ -424,7 +424,15 @@ message_on_reopen = "Issue #{number} has been reopened. Pinging @*T-types*."
 
 [notify-zulip."A-edition-2021"]
 required_labels = ["C-bug"]
-zulip_stream = 268952 # #edition 2021
+zulip_stream = 268952 # #edition
+topic = "Edition Bugs"
+message_on_add = """\
+Issue #{number} "{title}" has been added (previous edition 2021).
+"""
+
+[notify-zulip."A-edition-2024"]
+required_labels = ["C-bug"]
+zulip_stream = 268952 # #edition
 topic = "Edition Bugs"
 message_on_add = """\
 Issue #{number} "{title}" has been added.