Update dependency ch.qos.logback:logback-classic to v1.5.20

Author: renovate[bot]

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ java-parser = "3.27.1"
 jcommander = "1.82"
 jetbrains-annotations = "26.0.2-1"
 junit = "5.14.0"
-logback = "1.5.19"
+logback = "1.5.20"
 
 [libraries]
 assertj = { module = "org.assertj:assertj-core", version.ref = "assertj" }