Upgrade to AssertJ 3.27.6

Closes gh-1705

Author: snicoll

spring-ws-platform/build.gradle

@@ -62,7 +62,7 @@ dependencies {
 		api("org.apiguardian:apiguardian-api:1.1.2")
 		api("org.aspectj:aspectjrt:1.9.24")
 		api("org.aspectj:aspectjweaver:1.9.24")
-		api("org.assertj:assertj-core:3.27.3")
+		api("org.assertj:assertj-core:3.27.6")
 		api("org.awaitility:awaitility:4.3.0")
 		api("org.dom4j:dom4j:2.1.5")
 		api("org.easymock:easymock:5.6.0")