Upgrade Log4j to 2.17.1

Author: garyrussell

build.gradle

@@ -45,8 +45,8 @@ ext {
 	jacksonBomVersion = '2.10.5.20201202'
 	jaywayJsonPathVersion = '2.4.0'
 	junit4Version = '4.13.2'
-	junitJupiterVersion = '5.5.2'
-	log4jVersion = '2.17.0'
+	junitJupiterVersion = '5.8.2'
+	log4jVersion = '2.17.1'
 	logbackVersion = '1.2.3'
 	micrometerVersion = '1.3.20'
 	mockitoVersion = '3.1.0'