Build against Spring Framework SNAPSHOTs

Issue gh-12146
Issue gh-12148

gradle.properties

@@ -2,7 +2,7 @@ aspectjVersion=1.9.9.1
 reactorVersion=2022.0.0-RC1
 springJavaformatVersion=0.0.35
 springBootVersion=2.4.2
-springFrameworkVersion=6.0.0-RC1
+springFrameworkVersion=6.0.0-SNAPSHOT
 micrometerVersion=1.10.0-RC1
 openSamlVersion=4.1.1
 version=6.0.0-SNAPSHOT