Upgrade to Spring Framework 7.0.0-M9

Closes gh-47008

Author: snicoll

gradle.properties

@@ -20,7 +20,7 @@ mavenVersion=3.9.10
 mockitoVersion=5.19.0
 nativeBuildToolsVersion=0.11.0
 snakeYamlVersion=2.5
-springFrameworkVersion=7.0.0-SNAPSHOT
+springFrameworkVersion=7.0.0-M9
 springFramework60xVersion=6.0.23
 tomcatVersion=11.0.11
 nullabilityPluginVersion=0.0.4