Remove references to service in integration model specs

spec/models/integrations/datadog_spec.rb

@@ -91,7 +91,7 @@ RSpec.describe Integrations::Datadog do
       end
     end
 
-    context 'when service is not active' do
+    context 'when integration is not active' do
       let(:active) { false }
 
       it { is_expected.to be_valid }

spec/support/shared_examples/models/chat_integration_shared_examples.rb

@@ -13,7 +13,7 @@ RSpec.shared_examples "chat integration" do |integration_name|
       end
 
       it { is_expected.to validate_presence_of(:webhook) }
-      it_behaves_like "issue tracker service URL attribute", :webhook
+      it_behaves_like "issue tracker integration URL attribute", :webhook
     end
 
     context "when integration is inactive" do