Update log4j and slf4j versions in pom.xml

Author: conorheffron

pom.xml

@@ -34,8 +34,8 @@
 		<kotlin.version>1.6.0</kotlin.version>
 		<graphql.vers>14.0.0</graphql.vers>
 		<selenium.vers>4.45.0</selenium.vers>
-		<log4j.vers>2.26.0</log4j.vers>
-		<slf4j.vers>2.26.1</slf4j.vers>
+		<log4j.vers>2.26.1</log4j.vers>
+		<slf4j.vers>${log4j.vers}</slf4j.vers>
 		<lombok.version>1.18.46</lombok.version>
         <sonar.organization>conorheffron</sonar.organization>
         <mockito.version>5.23.0</mockito.version>