docs: finish user guide updates (#11603)

* finished settings changes

* fix todos

* update titles

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

@@ -5,7 +5,7 @@ sidebar_position: 1
 import { EllipsisHorizontal, ArrowUpRightOnBox, EllipsisVertical } from "@medusajs/icons"
 
 export const metadata = {
-  title: `Manage Inventory Items`,
+  title: `Manage Inventory Items in Medusa Admin`,
 }
 
 # {metadata.title}

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

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

www/apps/user-guide/app/inventory/reservations/page.mdx

@@ -5,7 +5,7 @@ sidebar_position: 3
 import { EllipsisHorizontal, ArrowUpRightOnBox, EllipsisVertical } from "@medusajs/icons"
 
 export const metadata = {
-  title: `Manage Reservations`,
+  title: `Manage Reservations in Medusa Admin`,
 }
 
 # {metadata.title}