docs: updated user stories in /learn (#13866)

* docs(learn): updated user stories

* Correct case in title for Advanced Fulfillment use case

* Update href for Advanced Fulfillment use case

---------

Co-authored-by: Shahed Nasser <shahednasser@gmail.com>

www/apps/book/app/learn/page.mdx

@@ -30,15 +30,15 @@ Below are some stories from companies that use Medusa:
 
 <CardList items={[
   {
-    title: "Use Case: D2C",
+    title: "Use Case: Advanced Fulfillment",
-    text: "How Matt Sleeps built a unique D2C experience with Medusa",
+    text: "How Eight Sleeps built their fulfillment setup with Medusa",
-    href: "https://medusajs.com/blog/matt-sleeps/",
+    href: "https://medusajs.com/blog/eight-sleep/",
     icon: FlyingBox,
   },
   {
-    title: "Use Case: OMS",
+    title: "Use Case: D2C",
-    text: "How Makro Pro Built an OMS with Medusa",
+    text: "How Matt Sleeps built a unique D2C experience with Medusa",
-    href: "https://medusajs.com/blog/makro-pro/",
+    href: "https://medusajs.com/blog/matt-sleeps/",
     icon: CheckCircleSolid,
   },
   {
@@ -48,21 +48,21 @@ Below are some stories from companies that use Medusa:
     icon: BuildingStorefront,
   },
   {
-    title: "Use Case: POS",
+    title: "Use Case: Distributor Platform",
-    text: "How Tekla built a global webshop and a POS system with Medusa",
+    text: "How Redington built a B2B distributor platform with Medusa",
-    href: "https://medusajs.com/blog/tekla-pos/",
+    href: "https://medusajs.com/blog/redington",
     icon: ComputerDesktop,
   },
   {
-    title: "Use Case: B2B",
+    title: "Use Case: Quick to market",
-    text: "How Visionary built B2B commerce with Medusa",
+    text: "How Partbase built their distributor platform with Medusa",
-    href: "https://medusajs.com/blog/visionary/",
+    href: "https://medusajs.com/blog/partbase",
     icon: BuildingsSolid,
   },
   {
-    title: "Use Case: Platform",
+    title: "Use Case: Complex products & pricing",
-    text: "How Catalog built a B2B platform for SMBs with Medusa",
+    text: "How EKI built a B2B platform with complex products and pricing",
-    href: "https://medusajs.com/blog/catalog/",
+    href: "https://medusajs.com/blog/eki/",
     icon: BuildingsSolid,
   }
 ]} itemsPerRow={2} />