Fix: correct test ID for readaloud-350

Author: marisademeglio

content/epub30-test-0304/EPUB/xhtml/Read_aloud_tests.xhtml

@@ -57,7 +57,7 @@
     </section>
   </section>
   <section id="ReadAloud-350" class="test">
-    <h2><span class="test-id">reading-350</span> <span class="test-title">Image alternate text reading</span></h2>
+    <h2><span class="test-id">ReadAloud-350</span> <span class="test-title">Image alternate text reading</span></h2>
     <p><img src="../images/mobydick.jpg" id="img267" alt="Moby Dick with a sailor in his mouth and several with harpoons hanging on him and their ship in the background" /></p>
     <p class="desc">Ensure that the alternate text for the image can be announced. </p>
     <p class="eval">If the read aloud announces the alternate text of the image above then the test passes. The alternate text should read as "Moby Dick with a sailor in his mouth and