Upgrade to Spring Framework 6.2.15

Closes gh-1266

Author: rainboyan

gradle/libs.versions.toml

@@ -64,7 +64,7 @@ snakeyaml = "2.3"
 spock = "2.3-groovy-4.0"
 spring-boot = "3.4.13"
 spring-dependency-management = "1.1.7"
-spring-framework = "6.2.14"
+spring-framework = "6.2.15"
 tomcat = "10.1.49"
 xhtmlrenderer = "R8"