lib/srdb1: fix warning about wrong namespace in version.xml

src/lib/srdb1/schema/version.xml

@@ -6,7 +6,7 @@
 
 ]>
 
-<table id="version" xmlns:xi="http://www.w3.org/2001/XInclude">
+<table id="version" xmlns:db="http://docbook.org/ns/docbook">>
     <name>version</name>
     <version>1</version>
     <type db="mysql">&MYSQL_TABLE_TYPE;</type>