fix docs/pure-caches in cjs mode (#2895)

wont need chdir on `docs/pure-caches`

Author: TheNorthMemory

.github/workflows/deploy.yml

@@ -56,6 +56,4 @@ jobs:
         if: env.COS_SECRET_ID
         env:
           COS_SECRET_KEY: ${{secrets.COS_SECRET_KEY}}
-        run: |
-          cd docs
-          pnpm run pure-caches
+        run: ./docs/pure-caches

docs/pure-caches

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 
-import TenYun from 'tenyun';
+const { default: TenYun } = require('tenyun');
 
 new TenYun(process.env.COS_SECRET_ID ?? '', process.env.COS_SECRET_KEY ?? '')
     .cdn