Update OAuth inflection to match spec (#35160)

spec/controllers/oauth/authorizations_controller_spec.rb

@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-RSpec.describe Oauth::AuthorizationsController do
+RSpec.describe OAuth::AuthorizationsController do
   let(:app) { Doorkeeper::Application.create!(name: 'test', redirect_uri: 'http://localhost/', scopes: 'read') }
 
   describe 'GET #new' do

spec/controllers/oauth/authorized_applications_controller_spec.rb

@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-RSpec.describe Oauth::AuthorizedApplicationsController do
+RSpec.describe OAuth::AuthorizedApplicationsController do
   render_views
 
   describe 'GET #index' do

spec/requests/oauth/userinfo_spec.rb

@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-RSpec.describe 'Oauth Userinfo Endpoint' do
+RSpec.describe 'OAuth Userinfo Endpoint' do
   include RoutingHelper
 
   let(:user)     { Fabricate(:user) }