Upgrade to Spring Framework 6.0.12

Closes gh-37258

Author: snicoll

gradle.properties

@@ -6,7 +6,7 @@ org.gradle.jvmargs=-Xmx2g -Dfile.encoding=UTF-8
 
 kotlinVersion=1.7.22
 nativeBuildToolsVersion=0.9.26
-springFrameworkVersion=6.0.12-SNAPSHOT
+springFrameworkVersion=6.0.12
 tomcatVersion=10.1.13
 
 kotlin.stdlib.default.dependency=false