Update dependency ch.qos.logback:logback-classic to v1.5.21 (#487)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 # libraries
 junit = "4.13.2"
 doma = "3.2.0"
-logback = "1.5.20"
+logback = "1.5.21"
 pluginVerifier = "1.398"
 
 # plugins