tech: upgrading log4j version (#27)

Author: gullerya

integrations-sdk/pom.xml

@@ -14,7 +14,7 @@
 	<properties>
 		<httpcore.version>4.4.4</httpcore.version>
 		<httpclient.version>4.5.2</httpclient.version>
-		<log4j.version>2.6.2</log4j.version>
+		<log4j.version>2.9.1</log4j.version>
 	</properties>
 
 	<dependencies>