Update dependency ch.qos.logback:logback-classic to v1.5.21 (#115)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ clikt = "5.0.3"
 intellij-platform = "2.10.4"
 kotlin = "2.2.21"
 kotlinx-coroutines = "1.10.2"
-logback = "1.5.20"
+logback = "1.5.21"
 oshai-logging = "7.0.13"
 okio = "3.16.2"