Update dependency com.squareup.okhttp3:mockwebserver to v4.12.0

Author: renovate[bot]

pom.xml

@@ -66,7 +66,7 @@
         <groupId>com.squareup.okhttp3</groupId>
         <artifactId>mockwebserver</artifactId>
         <!-- transitive dep of io.fabric8:kubernetes-server-mock, needs alignment with okhttp-api -->
-        <version>4.11.0</version>
+        <version>4.12.0</version>
       </dependency>
     </dependencies>
   </dependencyManagement>