PDFBOX-5660: update mockito

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1915263 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pdfbox/pom.xml b/pdfbox/pom.xml
index a7d85c8..a688ba2 100644
--- a/pdfbox/pom.xml
+++ b/pdfbox/pom.xml
@@ -86,7 +86,7 @@
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
-            <version>5.8.0</version>
+            <version>5.9.0</version>
             <scope>test</scope>
         </dependency>
         <!-- For legal reasons (incompatible license), these three dependencies below