Bump org.apache.logging.log4j:log4j-core

Bumps org.apache.logging.log4j:log4j-core from 2.20.0 to 2.21.0.

---
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] <support@github.com>

buildSrc/src/testKit/thirdPartyAudit/sample_jars/build.gradle

@@ -16,7 +16,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation "org.apache.logging.log4j:log4j-core:2.20.0"
+  implementation "org.apache.logging.log4j:log4j-core:2.21.0"
 }
 
 ["0.0.1", "0.0.2"].forEach { v ->