Fixes #38783 - update rubyipmi to fix IPMI connection issues

Author: evgeni

bundler.d/bmc.rb

@@ -1,8 +1,4 @@
 group :bmc do
-  gem 'rubyipmi', '>= 0.10.0'
+  gem 'rubyipmi', '>= 0.12.1'
   gem 'redfish_client', '>= 0.6.0'
-  # observer is a transitive dependency of rubyipmi
-  # Changed from a default gem to a bundled gem in Ruby 3.4 See https://stdgems.org/new-in/3.4/
-  # This is a workaround, till https://github.com/logicminds/rubyipmi/pull/61 is live
-  gem 'observer' if RUBY_VERSION >= '3.4'
 end