dependency: Update mockito monorepo to v5.20.0 (#176)

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

Author: renovate[bot]

chatformatter-core/build.gradle.kts

@@ -40,8 +40,8 @@ dependencies {
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
 
-    testImplementation("org.mockito:mockito-core:5.19.0")
-    testImplementation("org.mockito:mockito-junit-jupiter:5.19.0")
+    testImplementation("org.mockito:mockito-core:5.20.0")
+    testImplementation("org.mockito:mockito-junit-jupiter:5.20.0")
     testImplementation("me.clip:placeholderapi:2.11.6")
     testImplementation("org.assertj:assertj-core:3.27.4")
 }