Update mockito version (required for OpenJDK 22) (kitodo#6136)

Signed-off-by: Stefan Weil <[email protected]>

pom.xml

@@ -75,7 +75,7 @@
 
         <maven-jar-plugin.version>3.3.0</maven-jar-plugin.version>
         <maven-war-plugin.version>3.4.0</maven-war-plugin.version>
-        <mockito.version>5.0.0</mockito.version>
+        <mockito.version>5.9.0</mockito.version>
         <properties-maven-plugin.version>1.2.1</properties-maven-plugin.version>
         <selenium.version>3.141.59</selenium.version>
         <spring.security.version>5.7.11</spring.security.version>