Update dependency ch.qos.logback:logback-classic to v1.5.21

| datasource | package                        | from   | to     |
| ---------- | ------------------------------ | ------ | ------ |
| maven      | ch.qos.logback:logback-classic | 1.2.11 | 1.5.21 |

Author: renovate[bot]

libs.versions.toml

@@ -7,7 +7,7 @@ kotlinxSerialization = "1.6.21"
 dokka = "1.6.10"
 kotlinxSerializationJson = "1.3.3"
 ktor = "1.6.8"
-logbackClassic = "1.2.11"
+logbackClassic = "1.5.21"
 spring = "2.6.6"
 reactorKotlinExtensions = "1.1.6"
 undertow = "2.2.17.Final"