Update OAuth inflection to match spec (#35160)

db/migrate/20160826155805_add_superapp_to_oauth_applications.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class AddSuperappToOauthApplications < ActiveRecord::Migration[5.0]
+class AddSuperappToOAuthApplications < ActiveRecord::Migration[5.0]
   def change
     add_column :oauth_applications, :superapp, :boolean, default: false, null: false
   end

db/migrate/20170114203041_add_website_to_oauth_application.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class AddWebsiteToOauthApplication < ActiveRecord::Migration[5.0]
+class AddWebsiteToOAuthApplication < ActiveRecord::Migration[5.0]
   def change
     add_column :oauth_applications, :website, :string
   end

db/migrate/20220227041951_add_last_used_at_to_oauth_access_tokens.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class AddLastUsedAtToOauthAccessTokens < ActiveRecord::Migration[6.1]
+class AddLastUsedAtToOAuthAccessTokens < ActiveRecord::Migration[6.1]
   def change
     safety_assured do
       change_table(:oauth_access_tokens, bulk: true) do |t|

db/post_migrate/20220310060740_optimize_null_index_oauth_access_tokens_refresh_token.rb

@@ -2,7 +2,7 @@
 
 require Rails.root.join('lib', 'mastodon', 'migration_helpers')
 
-class OptimizeNullIndexOauthAccessTokensRefreshToken < ActiveRecord::Migration[5.2]
+class OptimizeNullIndexOAuthAccessTokensRefreshToken < ActiveRecord::Migration[5.2]
   include Mastodon::MigrationHelpers
 
   disable_ddl_transaction!

db/post_migrate/20220310060809_optimize_null_index_oauth_access_tokens_resource_owner_id.rb

@@ -2,7 +2,7 @@
 
 require Rails.root.join('lib', 'mastodon', 'migration_helpers')
 
-class OptimizeNullIndexOauthAccessTokensResourceOwnerId < ActiveRecord::Migration[5.2]
+class OptimizeNullIndexOAuthAccessTokensResourceOwnerId < ActiveRecord::Migration[5.2]
   include Mastodon::MigrationHelpers
 
   disable_ddl_transaction!