change HTML strike to del

2011/toledo/index.html

@@ -221,7 +221,7 @@ extra points.</p>
 <p>Believe it or not, it has strategy!</p>
 <p>When only one tank remains on the field, the level will advance.
 Don’t forget to destroy the aqua tank.</p>
-<p>The <strike>battle</strike>playground is surrounded by mountains and each level is
+<p>The <del>battle</del>playground is surrounded by mountains and each level is
 filled with random obstacles (pyramids and cubes).</p>
 <p>The bars show players energy and score; each bar shows energy
 and indicates the current player view (wider on the left). The right