Suppresses a RuboCop's offense

Follow up to rubocop/rubocop#7922.

This commit suppresses the following offense.

```console
% bundle exec rake
(snip)

Offenses:

lib/rubocop/cop/rails/http_status.rb:85:11: C:
Layout/EmptyLinesAroundAttributeAccessor: Add an empty line after
attribute accessor.
          attr_reader :node
          ^^^^^^^^^^^^^^^^^
lib/rubocop/cop/rails/http_status.rb:126:11: C:
Layout/EmptyLinesAroundAttributeAccessor: Add an empty line after
attribute accessor.
          attr_reader :node
          ^^^^^^^^^^^^^^^^^

145 files inspected, 2 offenses detected
```

lib/rubocop/cop/rails/http_status.rb

@@ -83,6 +83,7 @@ class SymbolicStyleChecker
                         'to define HTTP status code.'
 
           attr_reader :node
+
           def initialize(node)
             @node = node
           end
@@ -124,6 +125,7 @@ class NumericStyleChecker
           PERMITTED_STATUS = %i[error success missing redirect].freeze
 
           attr_reader :node
+
           def initialize(node)
             @node = node
           end