Fix: bot_test errcheck issue (#28822)

Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>

server/.golangci.yml

@@ -92,7 +92,6 @@ issues:
         channels/app/authorization_test.go|\
         channels/app/auto_responder_test.go|\
         channels/app/bot.go|\
-        channels/app/bot_test.go|\
         channels/app/brand.go|\
         channels/app/busy_test.go|\
         channels/app/channel.go|\