Bump org.assertj:assertj-core from 3.25.3 to 3.26.0 (#91)

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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -10,7 +10,7 @@ reactor-core = { module = "io.projectreactor:reactor-core", version.ref = "react
 reactor-test = { module = "io.projectreactor:reactor-test", version.ref = "reactorCore" }
 reactor-adapter = { module = "io.projectreactor.addons:reactor-adapter", version.ref = "reactorAddons" }
 reactor-extra = { module = "io.projectreactor.addons:reactor-extra", version.ref = "reactorAddons" }
-assertj = "org.assertj:assertj-core:3.25.3"
+assertj = "org.assertj:assertj-core:3.26.0"
 jsr305 = "com.google.code.findbugs:jsr305:3.0.1"
 junit4 = "junit:junit:4.13.2"
 kotlin-stdlib = { module = "org.jetbrains.kotlin:kotlin-stdlib", version.ref = "kotlin" }