Autofix Rubocop Style/StringLiterals (#23695)

spec/services/favourite_service_spec.rb

@@ -23,7 +23,7 @@ RSpec.describe FavouriteService, type: :service do
     let(:status) { Fabricate(:status, account: bob) }
 
     before do
-      stub_request(:post, "http://example.com/inbox").to_return(status: 200, body: "", headers: {})
+      stub_request(:post, 'http://example.com/inbox').to_return(status: 200, body: '', headers: {})
       subject.call(sender, status)
     end
 
@@ -32,7 +32,7 @@ RSpec.describe FavouriteService, type: :service do
     end
 
     it 'sends a like activity' do
-      expect(a_request(:post, "http://example.com/inbox")).to have_been_made.once
+      expect(a_request(:post, 'http://example.com/inbox')).to have_been_made.once
     end
   end
 end