feat: improve the replacement logic in README5

Author: shijistar

.github/workflows/npm-publish.yml

@@ -151,7 +151,7 @@ jobs:
 
       - name: Gzip umd files
         run: |
-          cp f.md README-zip.md
+          cp README.md README-zip.md
           cp README.zh-CN.md README.zh-CN-zip.md
 
       - name: Add README to Release