Revert "Use Spring Framework to 6.0.0-SNAPSHOT"

This reverts commit 545dfa569b3e740107f3943cd2d6f75aafce0cde.

gradle.properties

@@ -1,7 +1,7 @@
 aspectjVersion=1.9.9.1
 springJavaformatVersion=0.0.31
 springBootVersion=2.4.2
-springFrameworkVersion=6.0.0-SNAPSHOT
+springFrameworkVersion=6.0.0-M4
 openSamlVersion=3.4.6
 version=6.0.0-SNAPSHOT
 kotlinVersion=1.6.21