Update pac4j.version [SECURITY]

Author: renovate[bot]

pom.xml

@@ -17,7 +17,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <scala.binary.version>2.12</scala.binary.version>
     <lagom.version>1.6.7</lagom.version>
-    <pac4j.version>3.9.0</pac4j.version>
+    <pac4j.version>6.3.3</pac4j.version>
     <lagom.pac4j.version>2.2.1</lagom.pac4j.version>
     <junit.jupiter.version>6.0.3</junit.jupiter.version>
   </properties>