chore: some other deprecations

Signed-off-by: blam <ben@blam.sh>

plugins/kubernetes/src/alpha/pages.tsx

@@ -16,18 +16,20 @@
 
 import React from 'react'; // Add this line to import React
 
-import { createPageExtension } from '@backstage/frontend-plugin-api';
+import { PageBlueprint } from '@backstage/frontend-plugin-api';
 import {
   compatWrapper,
   convertLegacyRouteRef,
 } from '@backstage/core-compat-api';
 import { rootCatalogKubernetesRouteRef } from '../plugin';
 
-export const kubernetesPage = createPageExtension({
-  defaultPath: '/kubernetes',
-  // you can reuse the existing routeRef
-  // by wrapping into the convertLegacyRouteRef.
-  routeRef: convertLegacyRouteRef(rootCatalogKubernetesRouteRef),
-  // these inputs usually match the props required by the component.
-  loader: () => import('../Router').then(m => compatWrapper(<m.Router />)),
+export const kubernetesPage = PageBlueprint.make({
+  params: {
+    defaultPath: '/kubernetes',
+    // you can reuse the existing routeRef
+    // by wrapping into the convertLegacyRouteRef.
+    routeRef: convertLegacyRouteRef(rootCatalogKubernetesRouteRef),
+    // these inputs usually match the props required by the component.
+    loader: () => import('../Router').then(m => compatWrapper(<m.Router />)),
+  },
 });