add: replace RSS feed icon with SVG

Author: liuning0820

_layouts/default.html

@@ -49,8 +49,10 @@
                             <li><a href="/about">About</a></li>
 
                             <li>
-                                <a href="/feed.xml" title="RSS Feed">
-                                    <img src="https://wangbase.com/blogimg/asset/202107/bg2021072117.png" alt="RSS" style="width: 20px; height: 20px; border: 0pt none;">
+                                <a href="/feed.xml" title="RSS Feed" class="gh-header-icon">
+                                    <svg width="20px" height="20px" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+                                        <path d="M5 11C9.41828 11 13 14.5817 13 19M5 5C12.732 5 19 11.268 19 19M7 18C7 18.5523 6.55228 19 6 19C5.44772 19 5 18.5523 5 18C5 17.4477 5.44772 17 6 17C6.55228 17 7 17.4477 7 18Z" stroke="#000000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></path>
+                                    </svg>
                                 </a>
                             </li>