Fixed stock status display on change api

The visual state did not show the actual status,
the hidden one for ChangeDetection did work correctly

server.js

@@ -100,8 +100,10 @@ app.get("/api/change", async (req, res) => {
 
     if( quantity > 0 ) {
     	inStock = "InStock" ;
+      visualInStock = "In stock" ;
     } else{
       inStock = "OutOfStock" ;
+      visualStock = "Out of stock" ;
     }
 
   res.send(`
@@ -112,7 +114,7 @@ app.get("/api/change", async (req, res) => {
     }
     </style>
     <h1>${product}</h1>
-    <p>Status: ${inStock ? "In Stock" : "Out of Stock"}</p>
+    <p>Status: ${visualStock}</p>
 
     <!-- JSON-LD structured data for restock detection -->
     <script type="application/ld+json">