use id instead of title in the default plugin routes

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

.changeset/weak-berries-sing.md

@@ -0,0 +1,5 @@
+---
+'@backstage/cli': patch
+---
+
+Update the default routes to use id instead of title

packages/cli/templates/default-plugin/src/routes.ts.hbs

@@ -1,5 +1,5 @@
 import { createRouteRef } from '@backstage/core-plugin-api';
 
 export const rootRouteRef = createRouteRef({
-  title: '{{ id }}',
+  id: '{{ id }}',
 });