Upgrade to Spring Framework 6.0.0-M6.

Author: jxblum

gradle.properties

@@ -8,7 +8,7 @@ findbugsVersion=3.0.2
 multithreadedtcVersion=1.01
 pivotalCloudCacheVersion=1.14.5
 pivotalGemFireVersion=9.15.2
-springVersion=6.0.0-M5
+springVersion=6.0.0-M6
 springBootVersion=3.0.0-SNAPSHOT
 springCloudBindingsVersion=1.10.0
 springDataBomVersion=2022.0.0-M5