Update logback-classic to 1.5.16 (waylayio#212)

Author: scala-steward

build.sbt

@@ -4,7 +4,7 @@ val playJsonVersion      = "3.0.4"
 val playVersion          = "2.7.3" // test only
 val playWsVersion        = "2.1.11"
 val slf4jVersion         = "2.0.16"
-val logbackVersion       = "1.5.15"
+val logbackVersion       = "1.5.16"
 val specs2Version        = "4.20.9"
 val dockerTestkitVersion = "0.12.0"