Bump logback from 1.5.20 to 1.5.21 (#48)

Bumps `logback` from 1.5.20 to 1.5.21.

Updates `ch.qos.logback:logback-classic` 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)

Updates `ch.qos.logback:logback-core` 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
- dependency-name: ch.qos.logback:logback-core
  dependency-version: 1.5.21
  dependency-type: direct:production
...

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Author: dependabot[bot]

gradle/libs.versions.toml

@@ -22,7 +22,7 @@ jreleaser = "1.20.0"
 jsr305 = "3.0.2"
 junit-jupiter = "6.0.1"
 liquibase = "5.0.1"
-logback = "1.5.20"
+logback = "1.5.21"
 metrics = "4.2.37"
 micrometer = "1.16.0"
 mokito = "5.20.0"