Bump log4j.version from 2.19.0 to 2.20.0

Bumps `log4j.version` from 2.19.0 to 2.20.0.

Updates `log4j-slf4j-impl` 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/release-2.x/CHANGELOG.adoc)
- [Commits](apache/logging-log4j2@rel/2.19.0...rel/2.20.0)

Updates `log4j-core` 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/release-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-slf4j-impl
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.apache.logging.log4j:log4j-core
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -54,7 +54,7 @@
         <mongo.driver.version>4.8.0</mongo.driver.version>
 
         <slf4j.version>2.0.6</slf4j.version>
-        <log4j.version>2.19.0</log4j.version>
+        <log4j.version>2.20.0</log4j.version>
 
         <junit.jupiter.version>5.9.1</junit.jupiter.version>
         <mockito.version>4.11.0</mockito.version>