manual.texi Update pubdate for PHP/MySQL book.

Docs/manual.texi:
  Update pubdate for PHP/MySQL book.

Docs/manual.texi

@@ -1747,7 +1747,7 @@ time.
 @item Available @tab            @uref{http://service.bfast.com/bfast/click?bfmid=2181&sourceid=34233559&bfpid=0672317842&bfmtype=book, Barnes and Noble}
 @item Publisher @tab            Sams
 @item Authors   @tab            Luke Welling, Laura Thomson
-@item Pub Date  @tab            November 2000
+@item Pub Date  @tab            March 2001
 @item ISBN      @tab            0672317842
 @item Pages     @tab            700
 @item Price     @tab            $49.99