build(deps): bump ch.qos.logback:logback-core from 1.5.20 to 1.5.21

Bumps [ch.qos.logback:logback-core](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-core
  dependency-version: 1.5.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

examples/example-spring-boot-starter-web/build.gradle

@@ -12,8 +12,8 @@ plugins {
 // Hopefully with spring-boot 3.4.2+ this won't be needed anymore and can be removed.
 dependencyManagement {
     dependencies {
-        dependency 'ch.qos.logback:logback-core:1.5.20'
-        dependency 'ch.qos.logback:logback-classic:1.5.20'
+        dependency 'ch.qos.logback:logback-core:1.5.21'
+        dependency 'ch.qos.logback:logback-classic:1.5.21'
     }
 }
 

examples/example-spring-boot-starter-webflux/build.gradle

@@ -12,8 +12,8 @@ plugins {
 // Hopefully with spring-boot 3.4.2+ this won't be needed anymore and can be removed.
 dependencyManagement {
     dependencies {
-        dependency 'ch.qos.logback:logback-core:1.5.20'
-        dependency 'ch.qos.logback:logback-classic:1.5.20'
+        dependency 'ch.qos.logback:logback-core:1.5.21'
+        dependency 'ch.qos.logback:logback-classic:1.5.21'
     }
 }