Bump org.apache.logging.log4j:log4j-core in /packages/sub

Bumps org.apache.logging.log4j:log4j-core from 2.14.0 to 2.17.1.

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

Signed-off-by: dependabot[bot] <support@github.com>

packages/sub/pom.xml

@@ -23,7 +23,7 @@
 		<maven.compiler.source>1.7</maven.compiler.source>
 		<maven.compiler.target>1.7</maven.compiler.target>
    		<cloud.function.context.version>3.1.0</cloud.function.context.version>
-    		<log4j.version>2.14.0</log4j.version>
+    		<log4j.version>2.17.1</log4j.version>
   	</properties>
 
   	<dependencies>