Update dependency ch.qos.logback:logback-classic to v1.6.0

| datasource | package                        | from   | to    |
| ---------- | ------------------------------ | ------ | ----- |
| maven      | ch.qos.logback:logback-classic | 1.5.38 | 1.6.0 |

Author: renovate[bot]

gradle/libs.versions.toml

@@ -7,7 +7,7 @@ kjwt = "1.0.0"
 kotlin = "2.4.10"
 kover = "0.9.9"
 ktor = "3.5.1"
-logback = "1.5.38"
+logback = "1.6.0"
 postgresql = "42.7.13"
 slugify = "4.0.1"
 spotless = "8.8.0"