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

Author: renovate[bot]

build.gradle

@@ -13,7 +13,7 @@ ext{
     commercetoolsJavaSdkV2Version = '17.10.0'
     mockitoJunitJupiterVersion = '5.11.0'
     jupiterApiVersion = '5.10.2'
-    assertjVersion = '3.25.3'
+    assertjVersion = '3.26.0'
     pmdVersion = '7.1.0'
     jacocoVersion = '0.8.12'
     caffeineVersion = '3.1.8'