Add an apply Rails/EnumSyntax rubocop rule

This rule was added in rubocop-rails 2.26.0. Applying it allows
us to anticipate the deprecation of the current enum syntax
using keyword arguments, which is set to be removed in Rails
8.0, as mentioned in the rule's own documentation:

https://docs.rubocop.org/rubocop-rails/cops_rails.html#railsenumsyntax

.rubocop.yml

@@ -388,6 +388,9 @@ Rails/DynamicFindBy:
     - find_by_slug_or_id!
     - find_by_manager_login
 
+Rails/EnumSyntax:
+  Enabled: true
+
 Rails/EnumUniqueness:
   Enabled: true
 

app/models/dashboard/action.rb

@@ -9,7 +9,7 @@ class Dashboard::Action < ApplicationRecord
                               class_name: "Dashboard::ExecutedAction"
   has_many :proposals, through: :executed_actions
 
-  enum action_type: [:proposed_action, :resource]
+  enum :action_type, [:proposed_action, :resource]
 
   validates :title, presence: true, allow_blank: false, length: { in: 4..80 }
 

app/models/poll/shift.rb

@@ -8,7 +8,7 @@ class Poll
     validates :date, presence: true, uniqueness: { scope: [:officer_id, :booth_id, :task] }
     validates :task, presence: true
 
-    enum task: { vote_collection: 0, recount_scrutiny: 1 }
+    enum :task, { vote_collection: 0, recount_scrutiny: 1 }
 
     scope :current, -> { where(date: Date.current) }
 

app/models/progress_bar.rb

@@ -2,7 +2,7 @@ class ProgressBar < ApplicationRecord
   self.inheritance_column = nil
   RANGE = (0..100)
 
-  enum kind: %i[primary secondary]
+  enum :kind, %i[primary secondary]
 
   belongs_to :progressable, polymorphic: true
 

app/models/sdg/phase.rb

@@ -1,6 +1,6 @@
 class SDG::Phase < ApplicationRecord
   include Cardable
-  enum kind: %w[sensitization planning monitoring]
+  enum :kind, %w[sensitization planning monitoring]
   validates :kind, presence: true, uniqueness: true
 
   def self.[](kind)

app/models/tenant.rb

@@ -1,5 +1,5 @@
 class Tenant < ApplicationRecord
-  enum schema_type: %w[subdomain domain]
+  enum :schema_type, %w[subdomain domain]
 
   validates :schema,
             presence: true,

app/models/votation_type.rb

@@ -3,7 +3,7 @@ class VotationType < ApplicationRecord
 
   QUESTIONABLE_TYPES = %w[Poll::Question].freeze
 
-  enum vote_type: %w[unique multiple]
+  enum :vote_type, %w[unique multiple]
 
   validates :questionable, presence: true
   validates :questionable_type, inclusion: { in: ->(*) { QUESTIONABLE_TYPES }}