fix: replace responsive web dev bitly links (#41811)

curriculum/challenges/english/01-responsive-web-design/basic-html-cat-photo-app/part-016.md

@@ -71,7 +71,7 @@ assert(foundElems.length === 2);
         <h2>Cat Photos</h2>
         <!-- TODO: Add link to cat photos -->
         <p>Click here to view more <a target="_blank" href="https://freecatphotoapp.com">cat photos</a>.</p>
-        <a href="https://freecatphotoapp.com"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
+        <a href="https://freecatphotoapp.com"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
       </section>
 --fcc-editable-region--
     </main>