Upgrade to Spring Boot 3.2.12

Closes gh-749

Author: rainboyan

gradle/libs.versions.toml

@@ -54,7 +54,7 @@ sitemesh = "2.6.0"
 slf4j = "2.0.16"
 snakeyaml = "2.2"
 spock = "2.3-groovy-4.0"
-spring-boot = "3.2.11"
+spring-boot = "3.2.12"
 spring-dependency-management = "1.1.6"
 spring-framework = "6.1.14"
 tomcat = "10.1.33"