Bump ch.qos.logback:logback-classic from 1.5.20 to 1.5.21

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.5.20 to 1.5.21.
- [Release notes](https://github.com/qos-ch/logback/releases)
- [Commits](qos-ch/logback@v_1.5.20...v_1.5.21)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-classic
  dependency-version: 1.5.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle.kts

@@ -31,7 +31,7 @@ dependencies {
 
     implementation("io.ktor:ktor-client-logging:$ktorVersion")
     implementation("io.github.microutils:kotlin-logging-jvm:3.0.5")
-    implementation("ch.qos.logback:logback-classic:1.5.20")
+    implementation("ch.qos.logback:logback-classic:1.5.21")
 
     testImplementation("io.kotest:kotest-runner-junit5:$kotestVersion")
     testImplementation("io.kotest:kotest-assertions-core:$kotestVersion")