Merge pull request rails#52668 from neilvcarvalho/nc-per-attribute-encryption-docs

Fix attribute-specific encryption options [ci skip]

Author: rafaelfranca

guides/source/active_record_encryption.md

@@ -392,19 +392,19 @@ Both methods return `ActiveRecord::Encryption::Key` objects:
 
 A key can include arbitrary tags that will be stored unencrypted with the message. You can use `ActiveRecord::Encryption::Message#headers` to examine those values when decrypting.
 
-### Model-specific Key Providers
+### Attribute-specific Key Providers
 
-You can configure a key provider on a per-class basis with the `:key_provider` option:
+You can configure a key provider on a per-attribute basis with the `:key_provider` option:
 
 ```ruby
 class Article < ApplicationRecord
   encrypts :summary, key_provider: ArticleKeyProvider.new
 end
 ```
 
-### Model-specific Keys
+### Attribute-specific Keys
 
-You can configure a given key on a per-class basis with the `:key` option:
+You can configure a given key on a per-attribute basis with the `:key` option:
 
 ```ruby
 class Article < ApplicationRecord