dependencies: add missed comma

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@12151 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

appendices/dependencies.xml

@@ -261,7 +261,7 @@
 
         <seglistitem>
          <seg>Bash, Binutils, Coreutils, Diffutils, File, Flex, Gawk, GCC, Glibc,
-         Grep, Make, Perl, Sed, Texinfo and Zlib</seg>
+         Grep, Make, Perl, Sed, Texinfo, and Zlib</seg>
         </seglistitem>
       </segmentedlist>