Fix date in changelog

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11591 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter01/changelog.xml

@@ -44,7 +44,7 @@
     -->
 
     <listitem>
-      <para>2019-04-20</para>
+      <para>2019-05-03</para>
       <itemizedlist>
         <listitem>
           <para>[bdubbs] - Update to gcc-9.1.0. Fixes