基本的には[Railsガイドの手順](https://railsguides.jp/upgrading_ruby_on_rails.html#%E3%82%A2%E3%83%83%E3%83%97%E3%82%B0%E3%83%AC%E3%83%BC%E3%83%89%E6%89%8B%E9%A0%86)に従えば良いと思います。

ガイドの手順にもありますが、ぜひ`bin/rails app:update`コマンドを活用しましょう。

### `bin/rails app:update`コマンドの実行例

```
# bin/rails app:update
   identical  config/boot.rb
       exist  config
    conflict  config/application.rb
Overwrite /x/techtips/config/application.rb? (enter "h" for help) [Ynaqdhm] h
        Y - yes, overwrite
        n - no, do not overwrite
        a - all, overwrite this and all others
        q - quit, abort
        h - help, show this help
        d - diff, show the differences between the old and the new
        m - merge, run merge tool
Overwrite /x/techtips/config/application.rb? (enter "h" for help) [Ynaqdhm]
       force  config/application.rb
   identical  config/environment.rb
       exist  config/environments
    conflict  config/environments/development.rb
Overwrite /x/techtips/config/environments/development.rb? (enter "h" for help) [Ynaqdhm]
       force  config/environments/development.rb
    conflict  config/environments/production.rb
Overwrite /x/techtips/config/environments/production.rb? (enter "h" for help) [Ynaqdhm]
       force  config/environments/production.rb
    conflict  config/environments/test.rb
Overwrite /x/techtips/config/environments/test.rb? (enter "h" for help) [Ynaqdhm]
       force  config/environments/test.rb
       exist  config/initializers
    conflict  config/initializers/assets.rb
Overwrite /x/techtips/config/initializers/assets.rb? (enter "h" for help) [Ynaqdhm]
       force  config/initializers/assets.rb
    conflict  config/initializers/content_security_policy.rb
Overwrite /x/techtips/config/initializers/content_security_policy.rb? (enter "h" for help) [Ynaqdhm]
       force  config/initializers/content_security_policy.rb
      create  config/initializers/cors.rb
    conflict  config/initializers/filter_parameter_logging.rb
Overwrite /x/techtips/config/initializers/filter_parameter_logging.rb? (enter "h" for help) [Ynaqdhm]
       force  config/initializers/filter_parameter_logging.rb
   identical  config/initializers/inflections.rb
      create  config/initializers/new_framework_defaults_7_1.rb
    conflict  config/initializers/permissions_policy.rb
Overwrite /x/techtips/config/initializers/permissions_policy.rb? (enter "h" for help) [Ynaqdhm]
       force  config/initializers/permissions_policy.rb
      remove  config/initializers/cors.rb
       exist  bin
   identical  bin/rails
   identical  bin/rake
    conflict  bin/setup
Overwrite /x/techtips/bin/setup? (enter "h" for help) [Ynaqdhm]
       force  bin/setup
       rails  active_storage:update
Copied migration 20231128024504_add_service_name_to_active_storage_blobs.active_storage.rb from active_storage
Copied migration 20231128024505_create_active_storage_variant_records.active_storage.rb from active_storage
Copied migration 20231128024506_remove_not_null_on_active_storage_blobs_checksum.active_storage.rb from active_storage

After this, check Rails upgrade guide at https://guides.rubyonrails.org/upgrading_ruby_on_rails.html for more details about upgrading your app.
```