Fix missing github icon in dark mode

Author: mstathers

_layouts/default.html

@@ -47,8 +47,8 @@ <h1><a class="header" href=/>Stathers.net</a></h1>
     <div>
         <a class="img_link" style="float:left" href="https://github.com/mstathers/" target="_blank">
             <picture class="social_icon" alt="https://github.com/mstathers">
-                <source srcset="css/GitHub-Mark-White-32px.png" media="(prefers-color-scheme: dark)" />
-                <img src="css/GitHub-Mark-32px.png" />
+                <source srcset="/css/GitHub-Mark-White-32px.png" media="(prefers-color-scheme: dark)" />
+                <img src="/css/GitHub-Mark-32px.png" />
             </picture>
         </a>
 

contact.html

@@ -19,8 +19,8 @@ <h2>Contact Information</h2>
 
         <a class="img_link" href="https://github.com/mstathers/" target="_blank">
             <picture class="social_icon" alt="https://github.com/mstathers">
-                <source srcset="css/GitHub-Mark-White-32px.png" media="(prefers-color-scheme: dark)" />
-                <img src="css/GitHub-Mark-32px.png" />
+                <source srcset="/css/GitHub-Mark-White-32px.png" media="(prefers-color-scheme: dark)" />
+                <img src="/css/GitHub-Mark-32px.png" />
             </picture>
         </a><br>
     </div>