[gradle]: Bump org.mockito.kotlin:mockito-kotlin

Bumps [org.mockito.kotlin:mockito-kotlin](https://github.com/mockito/mockito-kotlin) from 4.1.0 to 5.4.0.
- [Release notes](https://github.com/mockito/mockito-kotlin/releases)
- [Commits](mockito/mockito-kotlin@4.1.0...5.4.0)

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

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

Author: dependabot[bot]

packages/interactive_media_ads/android/build.gradle

@@ -52,7 +52,7 @@ android {
         implementation 'com.google.ads.interactivemedia.v3:interactivemedia:3.35.1'
         testImplementation 'junit:junit:4.13.2'
         testImplementation 'org.jetbrains.kotlin:kotlin-test'
-        testImplementation "org.mockito.kotlin:mockito-kotlin:4.1.0"
+        testImplementation "org.mockito.kotlin:mockito-kotlin:5.4.0"
         testImplementation 'org.mockito:mockito-inline:5.1.0'
         testImplementation 'androidx.test:core:1.3.0'
     }