Avoid warnings about gems on starting Rails

Gemfile

@@ -17,6 +17,8 @@ gem "honeybadger"
 gem "importmap-rails"
 gem "mail", ">= 2.8.0.rc1"
 gem "tzinfo-data"
+gem "mutex_m" # Added to avoid: warning: mutex_m was loaded from the standard library, but will no longer be part of the default gems since Ruby 3.4.0. Add mutex_m to your Gemfile or gemspec. Also contact author of activesupport-7.0.8.4 to add mutex_m into its gemspec.
+gem "base64" # Added to avoid: warning: base64 was loaded from the standard library, but will no longer be part of the default gems since Ruby 3.4.0. Add base64 to your Gemfile or gemspec. Also contact author of activesupport-7.0.8.4 to add base64 into its gemspec.
 
 # Assets
 gem "sassc-rails"
@@ -33,3 +35,4 @@ group :test do
  gem "capybara"
  gem "factory_bot_rails"
 end
+

Gemfile.lock

@@ -79,6 +79,7 @@ GEM
  autoprefixer-rails (10.4.16.0)
  execjs (~> 2)
  barsoom_utils (0.2.0.45)
+ base64 (0.2.0)
  bigdecimal (3.1.8)
  bootstrap-sass (3.4.1)
  autoprefixer-rails (>= 5.2.1)
@@ -138,6 +139,7 @@ GEM
  minitest (5.23.1)
  multi_xml (0.7.1)
  bigdecimal (~> 3.1)
+ mutex_m (0.2.0)
  net-imap (0.4.12)
  date
  net-protocol
@@ -276,6 +278,7 @@ PLATFORMS
 DEPENDENCIES
  attr_extras
  barsoom_utils
+ base64
  bootstrap-sass
  bootstrap_forms!
  capybara
@@ -284,6 +287,7 @@ DEPENDENCIES
  httparty
  importmap-rails
  mail (>= 2.8.0.rc1)
+ mutex_m
  pg
  pry
  puma