fix(deps): update dependency org.mockito:mockito-bom to v5.12.0

Author: renovate[bot]

sigstore-java/build.gradle.kts

@@ -47,7 +47,7 @@ dependencies {
     testImplementation(platform("org.junit:junit-bom:5.10.2"))
     testImplementation("org.junit.jupiter:junit-jupiter")
 
-    testImplementation(platform("org.mockito:mockito-bom:5.11.0"))
+    testImplementation(platform("org.mockito:mockito-bom:5.12.0"))
     testImplementation("org.mockito:mockito-core")
     testImplementation("org.mockito:mockito-junit-jupiter")