Update dependency org.assertj:assertj-core to v3.25.1

Author: renovate[bot]

pom.xml

@@ -35,7 +35,7 @@
     <okhttp.version>4.12.0</okhttp.version>
 
     <!-- Test dependencies -->
-    <assertj.version>3.24.2</assertj.version>
+    <assertj.version>3.25.1</assertj.version>
     <guava.version>33.0.0-jre</guava.version>
     <junit.version>4.13.2</junit.version>
   </properties>