Update log4j to 2.19.0

Change-Id: I2ab5a3514856c1b6a99f634c9e6d55fbdbb4ea5f
diff --git a/operator/pom.xml b/operator/pom.xml
index 23cea9f..730f309 100644
--- a/operator/pom.xml
+++ b/operator/pom.xml
@@ -64,7 +64,7 @@
 		<dependency>
 			<groupId>org.apache.logging.log4j</groupId>
 			<artifactId>log4j-slf4j-impl</artifactId>
-			<version>2.17.2</version>
+			<version>2.19.0</version>
 		</dependency>
 		<dependency>
 			<groupId>com.urswolfer.gerrit.client.rest</groupId>