Merge pull request #2544 from sul-dlss/cbeer-patch-2

Support slack messages sent under Ubuntu 22+

app/models/exhibit_bot.rb

@@ -21,7 +21,7 @@ def default_channel
 
   def client
     @client ||= if FeatureFlags.new.slack_notifications?
-                  Slack::Web::Client.new
+                  Slack::Web::Client.new(ca_file: nil, ca_path: nil)
                 else
                   NullClient.new
                 end