Release 5.6.0

docs/antora.yml

@@ -1,3 +1,2 @@
 name: ROOT
 version: '5.6.0'
-prerelease: '-SNAPSHOT'

gradle.properties

@@ -3,7 +3,7 @@ springJavaformatVersion=0.0.29
 springBootVersion=2.4.2
 springFrameworkVersion=5.3.13
 openSamlVersion=3.4.6
-version=5.6.0-SNAPSHOT
+version=5.6.0
 kotlinVersion=1.5.31
 samplesBranch=main
 org.gradle.jvmargs=-Xmx3g -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError