docs: finish user guide updates (#11603)

* finished settings changes

* fix todos

* update titles

www/apps/user-guide/app/promotions/campaigns/page.mdx

@@ -2,7 +2,7 @@ import { EllipsisHorizontal } from "@medusajs/icons"
 import { Table } from "docs-ui"
 
 export const metadata = {
-  title: `Manage Campaigns`,
+  title: `Manage Campaigns in Medusa Admin`,
 }
 
 # {metadata.title}

www/apps/user-guide/app/promotions/create/page.mdx

@@ -3,7 +3,7 @@ sidebar_position: 1
 ---
 
 export const metadata = {
-  title: `Create a Promotion`,
+  title: `Create a Promotion in Medusa Admin`,
 }
 
 # {metadata.title}

www/apps/user-guide/app/promotions/manage/page.mdx

@@ -6,7 +6,7 @@ import { EllipsisHorizontal } from "@medusajs/icons"
 import { Table } from "docs-ui"
 
 export const metadata = {
-  title: `Manage Promotions`,
+  title: `Manage Promotions in Medusa Admin`,
 }
 
 # {metadata.title}

www/apps/user-guide/app/promotions/page.mdx

@@ -3,7 +3,7 @@ sidebar_autogenerate_exclude: true
 ---
 
 export const metadata = {
-  title: `Promotions`,
+  title: `Promotions in Medusa Admin`,
 }
 
 # {metadata.title}