Update dependency org.assertj:assertj-core to v3.26.0 (#1324)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

dependencyManagement/build.gradle.kts

@@ -51,7 +51,7 @@ val DEPENDENCIES = listOf(
   "com.google.code.findbugs:jsr305:3.0.2",
   "com.squareup.okhttp3:okhttp:4.12.0",
   "com.uber.nullaway:nullaway:0.10.26",
-  "org.assertj:assertj-core:3.25.3",
+  "org.assertj:assertj-core:3.26.0",
   "org.awaitility:awaitility:4.2.1",
   "org.bouncycastle:bcpkix-jdk15on:1.70",
   "org.junit-pioneer:junit-pioneer:1.9.1",