Rename Forest images to work around GitHub Pages weirdness

phantasy-star-online/maps/episode-1/index.html

@@ -18,15 +18,15 @@ <h1>Episode 1 Maps</h1>
     <nav>
         <h2>Forest 1</h2>
         <ul>
-            <li><img src="thumbnails/_forest1-1a.png" alt="Forest 1-A">A</li>
-            <li><img src="thumbnails/_forest1-1b.png" alt="Forest 1-B">B</li>
-            <li><img src="thumbnails/_forest1-1c.png" alt="Forest 1-C">C</li>
+            <li><img src="thumbnails/forest1-1a.png" alt="Forest 1-A">A</li>
+            <li><img src="thumbnails/forest1-1b.png" alt="Forest 1-B">B</li>
+            <li><img src="thumbnails/forest1-1c.png" alt="Forest 1-C">C</li>
         </ul>
         <h2>Forest 2</h2>
         <ul>
-            <li><img src="thumbnails/_forest2-1a.png" alt="Forest 2-A">A</li>
-            <li><img src="thumbnails/_forest2-1b.png" alt="Forest 2-B">B</li>
-            <li><img src="thumbnails/_forest2-1c.png" alt="Forest 2-C">C</li>
+            <li><img src="thumbnails/forest2-1a.png" alt="Forest 2-A">A</li>
+            <li><img src="thumbnails/forest2-1b.png" alt="Forest 2-B">B</li>
+            <li><img src="thumbnails/forest2-1c.png" alt="Forest 2-C">C</li>
         </ul>
         <h2>Cave 1</h2>
         <ul>