update example to use service specific naming

Author: Benjosh95

examples/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/examples/ResourcemanagerExample.java

@@ -2,7 +2,7 @@
 
 import cloud.stackit.sdk.resourcemanager.ApiClient;
 import cloud.stackit.sdk.resourcemanager.ApiException;
-import cloud.stackit.sdk.resourcemanager.api.DefaultApi;
+import cloud.stackit.sdk.resourcemanager.api.ResourceManagerApi;
 import cloud.stackit.sdk.resourcemanager.model.CreateFolderPayload;
 import cloud.stackit.sdk.resourcemanager.model.CreateProjectPayload;
 import cloud.stackit.sdk.resourcemanager.model.FolderResponse;
@@ -13,7 +13,7 @@
 class ResourcemanagerExample {
 	public static void main(String[] args) {
 		ApiClient apiClient = new ApiClient();
-		DefaultApi resourceManagerApi = new DefaultApi(apiClient);
+		ResourceManagerApi resourceManagerApi = new ResourceManagerApi(apiClient);
 
 		// replace this with something useful for real use
 		UUID containerParentId = UUID.randomUUID();