Fix iteration cadence read query variable

ee/app/assets/javascripts/iterations/components/iteration_cadence_form.vue

@@ -168,7 +168,7 @@ export default {
       variables() {
         return {
           fullPath: this.fullPath,
-          cadenceId: convertToGraphQLId(TYPE_ITERATIONS_CADENCE, this.cadenceId),
+          id: convertToGraphQLId(TYPE_ITERATIONS_CADENCE, this.cadenceId),
         };
       },
       result({ data: { group, errors }, error }) {

ee/spec/frontend/iterations/components/iteration_cadence_form_spec.js

@@ -244,6 +244,13 @@ describe('Iteration cadence form', () => {
       expect(wrapper.text()).toContain(wrapper.vm.i18n.edit.save);
     });
 
+    it('triggers read query with correct variables', () => {
+      expect(resolverMock).toHaveBeenCalledWith({
+        fullPath: groupPath,
+        id: automaticIterationCadence.id,
+      });
+    });
+
     it('disables fields while loading', async () => {
       createComponent({ query, resolverMock });