Update pac4j.version to v6.5.5

Author: renovate[bot]

pom.xml

@@ -9,7 +9,7 @@
 	<name>undertow-pac4j-demo</name>
 
 	<properties>
-		<pac4j.version>6.4.3</pac4j.version>
+		<pac4j.version>6.5.5</pac4j.version>
 		<undertow-pac4j.version>6.0.1</undertow-pac4j.version>
 		<undertow.version>2.3.20.Final</undertow.version>
 		<java.version>17</java.version>