Fix errors

Signed-off-by: addjuarez <6789375+addjuarez@users.noreply.github.com>

sdk-workflows/src/main/java/io/dapr/workflows/runtime/WorkflowRuntimeBuilder.java

@@ -26,8 +26,8 @@ public class WorkflowRuntimeBuilder {
   private static volatile WorkflowRuntime instance;
   private DurableTaskGrpcWorkerBuilder builder;
   private static final Logger LOGGER = LoggerFactory.getLogger(WorkflowRuntimeBuilder.class);
-  private volatile Set<String> activity_Set = new HashSet<String>(); 
-  private volatile Set<String> workflow_Set = new HashSet<String>(); 
+  private volatile Set<String> activitySet = new HashSet<String>(); 
+  private volatile Set<String> workflowSet = new HashSet<String>(); 
 
 
   public WorkflowRuntimeBuilder() {
@@ -47,8 +47,8 @@ public WorkflowRuntime build() {
         }
       }
     }
-    LOGGER.info("List of registered workflows: " + workflow_Set);
-    LOGGER.info("List of registered activites: " + activity_Set);
+    LOGGER.info("List of registered workflows: " + this.workflowSet);
+    LOGGER.info("List of registered activites: " + this.activitySet);
     return instance;
   }
 
@@ -63,7 +63,7 @@ public <T extends Workflow> WorkflowRuntimeBuilder registerWorkflow(Class<T> cla
     this.builder = this.builder.addOrchestration(
         new OrchestratorWrapper<>(clazz)
     );
-    WorkflowRuntimeBuilder.workflow_Set.add(clazz.getCanonicalName());
+    this.workflowSet.add(clazz.getCanonicalName());
     return this;
   }
 
@@ -77,6 +77,6 @@ public <T extends WorkflowActivity> void registerActivity(Class<T> clazz) {
     this.builder = this.builder.addActivity(
         new ActivityWrapper<>(clazz)
     );
-    WorkflowRuntimeBuilder.activity_Set.add(clazz.getCanonicalName());
+    this.activitySet.add(clazz.getCanonicalName());
   }
 }