feat(users): Change upload media to link

Replaced the "Upload media" button with a hyperlink to improve
navigation flow. This enhances user experience by making media uploads
more intuitive and aligned with typical web navigation patterns. The
change was implemented in the category template of the users section to
ensure consistency across the platform.

quackscape/users/templates/users/category.html

@@ -106,7 +106,7 @@
   >
     <div class="d-flex justify-content-between align-items-center">
       <h5>Available media</h5>
-      <button type="button" class="btn btn-primary">Upload media</button>
+      <a href="upload/" class="btn btn-primary">Upload media</a>
     </div>
     <table id="mediaTable" class="display">
       <thead>