chore(deps): bump org.apache.logging.log4j:log4j-bom

Bumps [org.apache.logging.log4j:log4j-bom](https://github.com/apache/logging-log4j2) from 2.20.0 to 2.21.1.
- [Release notes](https://github.com/apache/logging-log4j2/releases)
- [Commits](apache/logging-log4j2@rel/2.20.0...rel/2.21.1)

---
updated-dependencies:
- dependency-name: org.apache.logging.log4j:log4j-bom
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

auto-pipeline-examples/build.gradle.kts

@@ -39,7 +39,7 @@ dependencies {
     val kotlinVersion = project.getKotlinPluginVersion()
     implementation(platform("org.jetbrains.kotlin:kotlin-bom:${kotlinVersion}"))
     implementation(platform("org.junit:junit-bom:5.10.0"))
-    implementation(platform("org.apache.logging.log4j:log4j-bom:2.20.0"))
+    implementation(platform("org.apache.logging.log4j:log4j-bom:2.21.1"))
 }
 
 java.sourceCompatibility = JavaVersion.VERSION_1_8