Bump org.apache.logging.log4j:log4j-core from 2.19.0 to 2.20.0

Bumps [org.apache.logging.log4j:log4j-core](https://github.com/apache/logging-log4j2) from 2.19.0 to 2.20.0.
- [Release notes](https://github.com/apache/logging-log4j2/releases)
- [Changelog](https://github.com/apache/logging-log4j2/blob/2.x/CHANGELOG.adoc)
- [Commits](apache/logging-log4j2@rel/2.19.0...rel/2.20.0)

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

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

Author: dependabot[bot]

build.gradle

@@ -104,7 +104,7 @@ dependencies {
 
     testRuntimeOnly "org.apache.logging.log4j:log4j-slf4j-impl:2.19.0"
     testRuntimeOnly "org.apache.logging.log4j:log4j-api:2.19.0"
-    testRuntimeOnly "org.apache.logging.log4j:log4j-core:2.19.0"
+    testRuntimeOnly "org.apache.logging.log4j:log4j-core:2.20.0"
 
     integrationTestImplementation "org.apache.kafka:connect-api:$kafkaVersion"
     integrationTestImplementation("org.apache.kafka:connect-runtime:$kafkaVersion") {