Fix changeset descriptions

Signed-off-by: Joon Park <joonp@spotify.com>

.changeset/cyan-turtles-relax.md

@@ -2,6 +2,4 @@
 '@backstage/plugin-catalog-common': patch
 ---
 
-Add catalogEntityCreatePermission
-
-The `catalogEntityCreatePermission` can be imported and used when authoring a permission policy to restrict/grant a user's access to the catalog import plugin. (And the "Register Existing Component" button which navigates there).
+Adds new `catalogEntityCreatePermission` which can be imported and used when authoring a permission policy to restrict/grant a user's access to the catalog import plugin. (And the "Register Existing Component" button which navigates there).

.changeset/silver-eagles-reply.md

@@ -2,12 +2,14 @@
 '@backstage/create-app': patch
 ---
 
-Permission the catalog-import route
+Permission the `catalog-import` route
+
+The following changes are **required** if you intend to add permissions to your existing app.
 
 Use the `PermissionedRoute` for `CatalogImportPage` instead of the normal `Route`:
 
 ```diff
-// app/src/App.tsx
+// packages/app/src/App.tsx
 ...
 + import { PermissionedRoute } from '@backstage/plugin-permission-react';
 + import { catalogEntityCreatePermission } from '@backstage/plugin-catalog-common';