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-api` 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-api
  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] <[email protected]>

pom.xml

@@ -19,7 +19,7 @@
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
     <spotless-maven-plugin.version>2.34.0</spotless-maven-plugin.version>
-    <log4j.version>2.19.0</log4j.version>
+    <log4j.version>2.20.0</log4j.version>
   </properties>
 
   <dependencies>