create-app: add missing catalog-graph route

Signed-off-by: Johan Haals <johan.haals@gmail.com>

.changeset/purple-steaks-design.md

@@ -0,0 +1,18 @@
+---
+'@backstage/create-app': patch
+---
+
+Adds missing `/catalog-graph` route to `<CatalogGraphPage/>`.
+
+To fix this problem for a recently created app please update your `app/src/App.tsx`
+
+```diff
++ import { CatalogGraphPage } from '@backstage/plugin-catalog-graph';
+
+ ... omitted ...
+
+  </Route>
+    <Route path="/settings" element={<UserSettingsPage />} />
++   <Route path="/catalog-graph" element={<CatalogGraphPage />} />
+  </FlatRoutes>
+```

packages/create-app/templates/default-app/packages/app/src/App.tsx

@@ -29,6 +29,7 @@ import { Root } from './components/Root';
 import { AlertDisplay, OAuthRequestDialog } from '@backstage/core-components';
 import { createApp } from '@backstage/app-defaults';
 import { FlatRoutes } from '@backstage/core-app-api';
+import { CatalogGraphPage } from '@backstage/plugin-catalog-graph';
 
 const app = createApp({
   apis,
@@ -80,6 +81,7 @@ const routes = (
       {searchPage}
     </Route>
     <Route path="/settings" element={<UserSettingsPage />} />
+    <Route path="/catalog-graph" element={<CatalogGraphPage />} />
   </FlatRoutes>
 );