Upgrade to Spring Framework 6.0.0-M1

gradle.properties

@@ -1,7 +1,7 @@
 aspectjVersion=1.9.8.RC1
 springJavaformatVersion=0.0.29
 springBootVersion=2.4.2
-springFrameworkVersion=6.0.0-SNAPSHOT
+springFrameworkVersion=6.0.0-M1
 openSamlVersion=3.4.6
 version=6.0.0-SNAPSHOT
 kotlinVersion=1.5.31