upgrade mockito-core (#678) (#679)

Signed-off-by: Rupal Mahajan <[email protected]>
(cherry picked from commit 14ecd44)

Co-authored-by: Rupal Mahajan <[email protected]>

Author: opensearch-trigger-bot[bot]

build.gradle

@@ -192,7 +192,7 @@ dependencies {
     testImplementation "org.opensearch.test:framework:${opensearch_version}"
     testImplementation "org.jetbrains.kotlin:kotlin-test:${kotlin_version}"
     testImplementation "com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0"
-    testImplementation "org.mockito:mockito-core:5.1.0"
+    testImplementation "org.mockito:mockito-core:${versions.mockito}"
     testImplementation "org.mockito:mockito-junit-jupiter:4.7.0"
     testImplementation 'com.google.code.gson:gson:2.8.9'