docs: fix links to create notification provider (#5380)

www/apps/docs/content/development/plugins/create.mdx

@@ -321,7 +321,7 @@ If you're developing something specific, such as a payment processor plugin, you
   },
   {
     type: 'link',
-    href: '/development/file-service/create-file-service',
+    href: '/development/notification/create-notification-provider',
     label: 'Create a Notification Service',
     customProps: {
       icon: Icons['academic-cap-solid'],

www/apps/docs/src/utils/learning-paths.tsx

@@ -745,7 +745,7 @@ const paths: LearningPathType[] = [
                 </Link>
               </li>
               <li>
-                <Link to="/development/notification-service/create-notification-service">
+                <Link to="/development/notification/create-notification-provider">
                   Create Notification Service
                 </Link>
               </li>