chore(deps): bump org.assertj:assertj-core from 3.25.3 to 3.26.0

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.25.3 to 3.26.0.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.25.3...assertj-build-3.26.0)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

gradle/libs.versions.toml

@@ -98,7 +98,7 @@ edc-controlplane-callback-dispatcher-http = { module = "org.eclipse.edc:callback
 
 # third-party deps
 awaitility = { module = "org.awaitility:awaitility", version.ref = "awaitility" }
-assertj = { module = "org.assertj:assertj-core", version = "3.25.3" }
+assertj = { module = "org.assertj:assertj-core", version = "3.26.0" }
 failsafe-core = { module = "dev.failsafe:failsafe", version.ref = "failsafe" }
 restAssured = { module = "io.rest-assured:rest-assured", version.ref = "restAssured" }
 jakartaJson = { module = "org.glassfish:jakarta.json", version.ref = "jakarta-json" }