Update dependency org.mockito:mockito-core to v5.15.2 (#315)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -41,6 +41,6 @@ okio = "com.squareup.okio:okio:3.10.2"
 
 truth = { module = "com.google.truth:truth", version = "1.4.4" }
 junit = "junit:junit:4.13.2"
-mockito = "org.mockito:mockito-core:5.14.2"
+mockito = "org.mockito:mockito-core:5.15.2"
 mockitoKotlin = "com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0"
 assertJ = "org.assertj:assertj-core:3.27.3"