Update version.

Author: cfis

ext/libxml/ruby_xml_version.h

@@ -1,7 +1,7 @@
 /* Don't nuke this block!  It is used for automatically updating the
  * versions below. VERSION = string formatting, VERNUM = numbered
  * version for inline testing: increment both or none at all.*/
-#define RUBY_LIBXML_VERSION  "4.1.0"
+#define RUBY_LIBXML_VERSION  "4.1.1"
 #define RUBY_LIBXML_VERNUM   400
 #define RUBY_LIBXML_VER_MAJ   4
 #define RUBY_LIBXML_VER_MIN   1