Update dependency ch.qos.logback:logback-classic to v1.5.15

Author: renovate[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ jaxb-impl = "2.3.9"
 jetbrains-annotations = "26.0.1"
 jetty = "11.0.24"
 junit-jupiter = "5.10.0"
-logback = "1.5.14"
+logback = "1.5.15"
 mockito = "5.14.2"
 okhttp = "4.12.0"
 testcontainers = "1.20.4"