Bump org.assertj:assertj-bom in /log4j-samples-graalvm

Bumps [org.assertj:assertj-bom](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-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

log4j-samples-graalvm/pom.xml

@@ -41,7 +41,7 @@
     <revision>0.0.0-SNAPSHOT</revision>
 
     <!-- Dependencies (alphabetical) -->
-    <assertj.version>3.26.0</assertj.version>
+    <assertj.version>3.26.3</assertj.version>
     <junit.version>5.11.1</junit.version>
     <log4j.version>2.24.0</log4j.version>
     <logback.version>1.5.8</logback.version>