chore: update dts

Author: sxzz

playground/src/typings/auto-import.d.ts

@@ -138,6 +138,7 @@ declare global {
   const useCloned: typeof import('@vueuse/core')['useCloned']
   const useColorMode: typeof import('@vueuse/core')['useColorMode']
   const useConfirmDialog: typeof import('@vueuse/core')['useConfirmDialog']
+  const useCountdown: typeof import('@vueuse/core')['useCountdown']
   const useCounter: typeof import('@vueuse/core')['useCounter']
   const useCssModule: typeof import('vue')['useCssModule']
   const useCssVar: typeof import('@vueuse/core')['useCssVar']
@@ -433,6 +434,7 @@ declare module 'vue' {
     readonly useCloned: UnwrapRef<typeof import('@vueuse/core')['useCloned']>
     readonly useColorMode: UnwrapRef<typeof import('@vueuse/core')['useColorMode']>
     readonly useConfirmDialog: UnwrapRef<typeof import('@vueuse/core')['useConfirmDialog']>
+    readonly useCountdown: UnwrapRef<typeof import('@vueuse/core')['useCountdown']>
     readonly useCounter: UnwrapRef<typeof import('@vueuse/core')['useCounter']>
     readonly useCssModule: UnwrapRef<typeof import('vue')['useCssModule']>
     readonly useCssVar: UnwrapRef<typeof import('@vueuse/core')['useCssVar']>