Bump org.mockito:mockito-core from 4.3.1 to 5.3.1

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 4.3.1 to 5.3.1.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v4.3.1...v5.3.1)

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

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

build.gradle

@@ -42,7 +42,7 @@ compileJava {
 dependencies {
     // Use JUnit test framework.
     testImplementation 'junit:junit:4.13.2'
-    testImplementation 'org.mockito:mockito-core:4.3.1'
+    testImplementation 'org.mockito:mockito-core:5.3.1'
 
     implementation platform('software.amazon.awssdk:bom:2.20.72')