[PORT] Update channel.py to make it clear that Telegram supports card actions (#1437)

Port of microsoft/botbuilder-dotnet#5024

Co-authored-by: tracyboehrer <tracyboehrer@users.noreply.github.com>

Author: Kyle Delaney

libraries/botbuilder-dialogs/botbuilder/dialogs/choices/channel.py

@@ -61,6 +61,7 @@ def supports_card_actions(channel_id: str, button_cnt: int = 100) -> bool:
             Channels.ms_teams: 3,
             Channels.line: 99,
             Channels.slack: 100,
+            Channels.telegram: 100,
             Channels.emulator: 100,
             Channels.direct_line: 100,
             Channels.webchat: 100,