Don't use sidekick 7 beta version

PowerKiKi · PowerKiKi · commit e51958cc69e3 · 2022-11-04T15:00:47.000+01:00
That breaks the whole Redmine
diff --git a/Gemfile b/Gemfile
@@ -32,7 +32,7 @@ gem 'RedCloth'
 gem 'rack-parser', require: 'rack/parser'
 
 # temp autoloading fix
-gem 'sidekiq'
+gem 'sidekiq', '<7'
 gem 'sshkey'
 
 group :development, :test do
