pom.xml: updated Spring Framework to 3.0.6

@see
http://static.springsource.org/spring/docs/3.0.6.RELEASE/changelog.txt

No functional changes.

Author: php-coder

pom.xml

@@ -10,7 +10,7 @@
 	<packaging>war</packaging>
 
 	<properties>
-		<spring.version>3.0.5.RELEASE</spring.version>
+		<spring.version>3.0.6.RELEASE</spring.version>
 		<hibernate.version>3.6.5.Final</hibernate.version>
 
 		<tomcat.dir>/usr/share/tomcat6</tomcat.dir>