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
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

approvaltests-util-tests/pom.xml

@@ -55,7 +55,7 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.15.0</version>
+            <version>2.16.0</version>
         </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>