Change image source from unsplash to picsum (unsplash no longer open) (#466)

Author: dgvirtual

themes/Auth/Components/unsplash.php

@@ -1,7 +1,7 @@
-<div style="background-image: url(https://source.unsplash.com/1600x900/?nature,water); background-size: cover; position: absolute; top: 43px; left:0; right: 0; bottom: 0; z-index: 0">
+<div style="background-image:url(https://picsum.photos/1600/900);background-size:cover;position:absolute;top:0px;left:0;right:0;bottom:0;z-index:0">
     <?= $slot ?>
 
     <p style="position: absolute; bottom: 0px; right: 15px; width: auto; mix-blend-mode: difference; color: white; font-size: 12px">
-        Image by <a href="https://unsplash.com/" style="color: white" target="_blank">Unsplash</a>
+        Image by <a href="https://picsum.photos/" style="color: white" target="_blank">Picsum</a>
     </p>
 </div>