Update langchain4j, ... to 0.31.0

build.sbt

@@ -5,7 +5,7 @@ lazy val pureconfigVersion  = "0.17.6"
 lazy val redis4CatsVersion  = "1.7.0"
 lazy val sttpClient3Version = "3.9.7"
 lazy val sttpClient4Version = "4.0.0-M14"
-lazy val langchain4jVersion = "0.30.0"
+lazy val langchain4jVersion = "0.31.0"
 lazy val xefVersion         = "0.0.3"
 
 lazy val root = (project in file("."))