Set CC image size explicitly

scipost_django/scipost/templates/scipost/footer.html

@@ -50,7 +50,7 @@
       <div class="col-12">
         <br>
         <a rel="license noopener" href="https://creativecommons.org/licenses/by/4.0/" target="_blank" class="m-2">
-          <img alt="Creative Commons License" style="border-width:0" src="https://licensebuttons.net/l/by/4.0/80x15.png" />
+          <img alt="Creative Commons License" style="border-width:0" width="80" height="15" src="https://licensebuttons.net/l/by/4.0/80x15.png" />
         </a>
         Except where otherwise noted, all content on {{ request.get_host }} is licensed under a <a rel="license noopener" href="https://creativecommons.org/licenses/by/4.0/" target="_blank">Creative Commons Attribution 4.0 International License</a>.
       </div>