chore(deps): update dependency org.assertj:assertj-core to v3.26.0

Author: renovate[bot]

pom.xml

@@ -57,7 +57,7 @@
     <maven-plugin-tools.version>3.13.0</maven-plugin-tools.version>
     <restdocs-api-spec.version>0.19.2</restdocs-api-spec.version>
     <junit.version>5.10.2</junit.version>
-    <assertj.version>3.25.3</assertj.version>
+    <assertj.version>3.26.0</assertj.version>
     <mockito.version>5.12.0</mockito.version>
   </properties>