Bump log4j.version from 2.17.1 to 2.20.0

Bumps `log4j.version` from 2.17.1 to 2.20.0.

Updates `org.apache.logging.log4j:log4j-core` from 2.17.1 to 2.20.0
- [Changelog](https://github.com/apache/logging-log4j2/blob/2.x/CHANGELOG.adoc)
- [Commits](apache/logging-log4j2@rel/2.17.1...rel/2.20.0)

Updates `org.apache.logging.log4j:log4j-slf4j-impl` from 2.17.1 to 2.20.0
- [Changelog](https://github.com/apache/logging-log4j2/blob/2.x/CHANGELOG.adoc)
- [Commits](apache/logging-log4j2@rel/2.17.1...rel/2.20.0)

Updates `org.apache.logging.log4j:log4j-api` from 2.17.1 to 2.20.0
- [Changelog](https://github.com/apache/logging-log4j2/blob/2.x/CHANGELOG.adoc)
- [Commits](apache/logging-log4j2@rel/2.17.1...rel/2.20.0)

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

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

pom.xml

@@ -10,7 +10,7 @@
     <properties>
         <htsjdk.version>2.20.3</htsjdk.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <log4j.version>2.17.1</log4j.version>
+        <log4j.version>2.20.0</log4j.version>
 
         <junit.jupiter.version>5.7.2</junit.jupiter.version>
         <junit.platform.version>1.7.2</junit.platform.version>