Bump org.mockito:mockito-core from 5.4.0 to 5.5.0

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 5.4.0 to 5.5.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.4.0...v5.5.0)

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

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

build.gradle

@@ -23,7 +23,7 @@ dependencies {
 	implementation("com.slack.api:bolt-jetty:1.30.0")
 	// ***** TEST DEPENDENCIES *****
 	testImplementation('org.junit.jupiter:junit-jupiter-engine:5.10.0')
-	testImplementation('org.mockito:mockito-core:5.4.0')
+	testImplementation('org.mockito:mockito-core:5.5.0')
 }
 
 application {