fix: instance api alignment

src/pages/gpu-service/constants.ts

@@ -3,6 +3,7 @@ export const apiVersion = 'worker.gpustack.ai/v1';
 export const KindMapping = {
   sshPublicKey: 'InstanceSSHPublicKey',
   instance: 'Instance',
+  instanceType: 'InstanceType',
   instancePersistentVolume: 'InstancePersistentVolume',
   instanceTemplate: 'InstanceTemplate'
 };