Simplify changeset and test

Signed-off-by: Ronald Tol <tol.ronald@gmail.com>

.changeset/modern-mugs-shout.md

@@ -2,4 +2,4 @@
 '@backstage/core-components': patch
 ---
 
-Adds prop to SupportButton to override support config items and adds the option to show custom list items per page
+Add items prop to SupportButton. This prop can be used to override the items that would otherwise be grabbed from the config.

packages/core-components/src/components/SupportButton/SupportButton.test.tsx

@@ -24,9 +24,9 @@ import {
 import { SupportButton } from './SupportButton';
 import { configApiRef } from '@backstage/core-plugin-api';
 
-const configApi = {
-  getOptionalConfig: () =>
-    new MockConfigApi({
+const configApi = new MockConfigApi({
+  app: {
+    support: {
       url: 'https://github.com',
       items: [
         {
@@ -35,8 +35,9 @@ const configApi = {
           links: [{ title: 'Github Issues', url: '/issues' }],
         },
       ],
-    }),
-};
+    },
+  },
+});
 
 const SUPPORT_BUTTON_ID = 'support-button';
 const POPOVER_ID = 'support-button-popover';