check chapter covers size

Sources/iOSAccessibilityHandbook/iOSAccessibilityHandbook.docc/Pages/Integration/AdoptionGuide.tutorial

@@ -20,7 +20,7 @@
         @Image(source: placeholder-image.png, alt: "")
 
         @Chapter(name: "Expose interfacial data") {
-            @Image(source: chapter-placeholder.png, alt: "")
+            @Image(source: chapter-describe.png, alt: "")
 
             First of all, every **functional element** of the interface has to be sufficiently *described*.
 
@@ -32,7 +32,7 @@
         }
 
         @Chapter(name: "Ensure that navigation is possible") {
-            @Image(source: chapter-placeholder.png, alt: "")
+            @Image(source: chapter-connect.png, alt: "")
 
             Secondly, to *reconnect* the elements into a integral interface certain **alternative controlling options** have to be enabled.
 
@@ -42,7 +42,7 @@
         }
 
         @Chapter(name: "Secure user scenarios") {
-            @Image(source: chapter-placeholder.png, alt: "")
+            @Image(source: chapter-simplify.png, alt: "")
 
             Lastly, to make sure that the users of assistive technology are able to complete the tasks they are *supposed* to achieve we should **review the layout** of the accessible interface.