Bump org.assertj:assertj-core from 3.26.0 to 3.26.3 (#754)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

maven-plugin/build.gradle

@@ -24,7 +24,7 @@ dependencies {
     testImplementation 'org.hamcrest:hamcrest-core:2.2'
     testImplementation 'io.takari.maven.plugins:takari-plugin-testing:3.0.3'
     testImplementation 'io.takari.maven.plugins:takari-plugin-integration-testing:3.0.3'
-    testImplementation 'org.assertj:assertj-core:3.26.0'
+    testImplementation 'org.assertj:assertj-core:3.26.3'
     testRuntimeOnly 'org.apache.maven:maven-compat:3.9.8'
     testRuntimeOnly 'org.apache.maven:maven-core:3.9.8'
 }