chore: Update dependencies to the latest versions (#5033)

app/models/integrations/app.rb

@@ -28,7 +28,7 @@ class Integrations::App
   def action
     case params[:id]
     when 'slack'
-      "#{params[:action]}&client_id=#{ENV['SLACK_CLIENT_ID']}&redirect_uri=#{self.class.slack_integration_url}"
+      "#{params[:action]}&client_id=#{ENV.fetch('SLACK_CLIENT_ID', nil)}&redirect_uri=#{self.class.slack_integration_url}"
     else
       params[:action]
     end
@@ -57,7 +57,7 @@ class Integrations::App
   end
 
   def self.slack_integration_url
-    "#{ENV['FRONTEND_URL']}/app/accounts/#{Current.account.id}/settings/integrations/slack"
+    "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{Current.account.id}/settings/integrations/slack"
   end
 
   class << self