Bump log4j-core from 2.15.0 to 2.16.0

Bumps log4j-core from 2.15.0 to 2.16.0.

---
updated-dependencies:
- dependency-name: org.apache.logging.log4j:log4j-core
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pom.xml

@@ -16,7 +16,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<java.version>11</java.version>
 		<junit.version>5.7.1</junit.version>
-		<log4j.version>2.15.0</log4j.version>
+		<log4j.version>2.16.0</log4j.version>
 		<orchestra.version>1.6.10</orchestra.version>
 		<saxon.version>10.3</saxon.version>
 		<ignoreSigningInformation>true</ignoreSigningInformation>