Upgrade to Spring Framework 6.2.0-M6

Closes gh-41555

Author: snicoll

gradle.properties

@@ -14,7 +14,7 @@ junitJupiterVersion=5.10.3
 kotlinVersion=1.9.24
 mavenVersion=3.9.4
 nativeBuildToolsVersion=0.10.2
-springFrameworkVersion=6.2.0-SNAPSHOT
+springFrameworkVersion=6.2.0-M6
 springFramework60xVersion=6.0.21
 tomcatVersion=10.1.26
 snakeYamlVersion=2.2