Fix capitalisation (#161)

Author: frankieroberto

app/_layouts/product.njk

@@ -50,7 +50,7 @@
         "Manage your appointments",
         "Record a vaccination",
         "Select people for invitation",
-        "Vaccinations in the app"
+        "Vaccinations in the App"
       ] },
       { title: "Personalised prevention", services: [
         "Lung health check",