Update logback-classic, logback-core to 1.5.20 (#331)

Author: scala-steward

build.sbt

@@ -28,8 +28,8 @@ libraryDependencies ++= Seq(
   "org.scalatest" %% "scalatest" % "3.2.19" % Test,
   "org.testng" % "testng" % "7.11.0" % Test,
   "com.google.guava" % "guava" % "33.5.0-jre" % Test,
-  "ch.qos.logback" % "logback-classic" % "1.5.17" % Test,
-  "ch.qos.logback" % "logback-core" % "1.5.17" % Test
+  "ch.qos.logback" % "logback-classic" % "1.5.20" % Test,
+  "ch.qos.logback" % "logback-core" % "1.5.20" % Test
 )
 
 updateOptions := updateOptions.value.withGigahorse(false)