Bump org.assertj:assertj-core from 3.25.3 to 3.26.0 (#4705)

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
...

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

Author: dependabot[bot]

operator/pom.xml

@@ -26,7 +26,7 @@
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <awaitility.version>4.2.1</awaitility.version>
         <kubernetes-client-java-gen.version>6.12.1</kubernetes-client-java-gen.version>
-        <assertj.core.version>3.25.3</assertj.core.version>
+        <assertj.core.version>3.26.0</assertj.core.version>
         <bouncycastle.version>1.70</bouncycastle.version>
         <!-- ATTENTION! The Quarkus version needs to be aligned with the Quarkus Operator SDK -->
         <!-- TODO: possibly stabilize on something shared with the rest of the repo -->