deps: update dependency org.mockito:mockito-core to v3.12.4 (#2146)

Author: renovate-bot

google-cloud-bigquerystorage/pom.xml

@@ -173,7 +173,7 @@
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
-      <version>3.3.3</version>
+      <version>3.12.4</version>
       <scope>test</scope>
     </dependency>
     <dependency>