Bump org.assertj:assertj-core from 3.25.3 to 3.26.3

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.25.3 to 3.26.3.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.25.3...assertj-build-3.26.3)

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

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

pom.xml

@@ -323,7 +323,7 @@
         <testfx.version>4.0.18</testfx.version>
         <jackson.version>2.17.2</jackson.version>
         <bouncycastle.version>1.78.1</bouncycastle.version>
-        <assertj.version>3.25.3</assertj.version>
+        <assertj.version>3.26.3</assertj.version>
         <hamcrest.version>2.2</hamcrest.version>
         <javafx.version>21.0.4</javafx.version>
         <jakarta-el.version>4.0.2</jakarta-el.version>