Bump org.assertj:assertj-core from 3.26.0 to 3.26.3

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.26.0 to 3.26.3.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.26.0...assertj-build-3.26.3)

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

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

Author: dependabot[bot]

plexus-java/pom.xml

@@ -54,7 +54,7 @@
     <dependency>
       <groupId>org.assertj</groupId>
       <artifactId>assertj-core</artifactId>
-      <version>3.26.0</version>
+      <version>3.26.3</version>
       <scope>test</scope>
     </dependency>
   </dependencies>