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] <support@github.com>

Author: dependabot[bot]

log4j-parent/pom.xml

@@ -93,7 +93,7 @@
     <!-- =====================================================
          Direct dependency version properties (in alphabetical order)
          ===================================================== -->
-    <assertj.version>3.25.3</assertj.version>
+    <assertj.version>3.26.0</assertj.version>
     <awaitility.version>4.2.1</awaitility.version>
     <bsh.version>2.0b6</bsh.version>
     <commons-codec.version>1.17.0</commons-codec.version>