refactor: replace getCurrentInstance with currentInstance in useHost function

Author: edison1105

packages/runtime-dom/src/apiCustomElement.ts

@@ -26,8 +26,8 @@ import {
   type VNode,
   type VNodeProps,
   createVNode,
+  currentInstance,
   defineComponent,
-  getCurrentInstance,
   nextTick,
   unref,
   warn,
@@ -793,7 +793,7 @@ export class VueElement extends VueElementBase<
 }
 
 export function useHost(caller?: string): VueElementBase | null {
-  const instance = getCurrentInstance()
+  const instance = currentInstance
   const el = instance && (instance.ce as VueElementBase)
   if (el) {
     return el