[ruby/etc] Bump version to 1.4.1

https://github.com/ruby/etc/commit/b3e9d9ceb0

ext/etc/etc.c

@@ -56,7 +56,7 @@ static VALUE sGroup;
 #endif
 char *getlogin();
 
-#define RUBY_ETC_VERSION "1.4.0"
+#define RUBY_ETC_VERSION "1.4.1"
 
 #ifdef HAVE_RB_DEPRECATE_CONSTANT
 void rb_deprecate_constant(VALUE mod, const char *name);