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:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

gradle/dependencies.gradle

@@ -1,7 +1,7 @@
 dependencies {
   implementation group: 'org.apache.pdfbox', name: 'pdfbox', version: '3.0.2', transitive: true
   implementation group: 'org.hamcrest', name: 'hamcrest', version: '2.2', transitive: false
-  implementation group: 'org.assertj', name: 'assertj-core', version: '3.26.0'
+  implementation group: 'org.assertj', name: 'assertj-core', version: '3.26.3'
   testImplementation 'org.junit.jupiter:junit-jupiter-api:5.10.3'
   testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.10.3'
 }