Upgrade to AssertJ 3.27.7

Closes spring-projectsgh-49075

Author: wilkinsona

gradle.properties

@@ -6,7 +6,7 @@ org.gradle.caching=true
 org.gradle.parallel=true
 org.gradle.jvmargs=-Xmx2g -Dfile.encoding=UTF-8
 
-assertjVersion=3.27.6
+assertjVersion=3.27.7
 checkstyleToolVersion=10.12.4
 commonsCodecVersion=1.18.0
 graalVersion=22.3