[web] Fix license image link.

web/layouts/partials/global-footer-nav.html

@@ -7,7 +7,7 @@
 
       <a class="ml-3" rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">
         <img alt="Creative Commons License" style="border-width:0"
-          src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png" data-pagefind-ignore="all" />
+          src="https://licensebuttons.net/l/by-sa/4.0/88x31.png" data-pagefind-ignore="all" />
       </a>
       <a class="ml-3" href="https://www.netlify.com">
         <img style="height: 31px;" src="https://www.netlify.com/img/global/badges/netlify-dark.svg"