fixed links

index.html

@@ -78,8 +78,8 @@
             <b>Source code:</b>
             <ul>
                 <li><a href="https://git.datenvorr.at/anton/fractals2d.h" target="_blank">2D Mandelbrot rendering</a></li>
-                <li><a href="https://git.datenvorr.at/anton/raymarcher.c" target="_blank">3D Fractal rendering</a></li>
-                <li><a href="https://git.datenvorr.at/anton/raymarcher.c" target="_blank">Image library and bitmap encoder</a></li>
+                <li><a href="https://git.datenvorr.at/anton/raymarcher.h" target="_blank">3D Fractal rendering</a></li>
+                <li><a href="https://git.datenvorr.at/anton/images.h" target="_blank">Image library and bitmap encoder</a></li>
             </ul>
         </div>
         <div class="footer-other">