Bump org.assertj:assertj-core from 3.25.3 to 3.26.0 in /java-connectors

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.25.3 to 3.26.0.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.25.3...assertj-build-3.26.0)

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

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

java-connectors/build.gradle

@@ -65,7 +65,7 @@ allprojects {
         testImplementation group: 'org.mockito', name: 'mockito-core', version: mockitoJupiterVersion
         testImplementation group: 'org.mockito', name: 'mockito-junit-jupiter', version: mockitoJupiterVersion
         testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter', version: jUnitVersion
-        testImplementation group: 'org.assertj', name: 'assertj-core', version: '3.25.3'
+        testImplementation group: 'org.assertj', name: 'assertj-core', version: '3.26.0'
 
     }