static: replace artwork

Artwork is from http://www.rd-sounds.com/C83.html

templates/footer.html

@@ -1,5 +1,5 @@
 <footer>
-    <a href="/"><img src="[[path|/mask-icon.svg]]" width="512" height="512" alt=""/>GrapheneOS</a>
+    <a href="/"><img src="[[path|/mask-icon.svg]]" width="512" height="512" alt=""/>Hakurei</a>
     <ul id="social">
         <li><a href="https://discuss.grapheneos.org/">Forum</a></li>
         <li><a href="https://discord.com/invite/grapheneos">Discord</a></li>

templates/header.html

@@ -1,7 +1,7 @@
 <header>
     <nav id="site-menu">
         <ul>
-            <li {% if current_page == "/" %}aria-current="page"{% endif %}><a href="/"><img src="[[path|/mask-icon.svg]]" alt=""/>GrapheneOS</a></li>
+            <li {% if current_page == "/" %}aria-current="page"{% endif %}><a href="/"><img src="[[path|/mask-icon.svg]]" alt=""/>Hakurei</a></li>
             <li {% if current_page == "features" %}aria-current="page"{% endif %}><a href="/features.html">Features</a></li>
             <li {% if current_page == "install" %}aria-current="page"{% endif %}><a href="/install/">Install</a></li>
             <li {% if current_page == "build" %}aria-current="page"{% endif %}><a href="/build.html">Build</a></li>