Fix mkdocs issue

Author: NinePiece2

.github/workflows/build-deploy-site.yml

@@ -74,7 +74,7 @@ jobs:
         run: |
           cp Style/overrides.css docs/
           echo "leetcode.romitsagu.com" > ./docs/CNAME
-          cp Site_README.md docs/
+          cp Site_README.md docs/README.md
 
       - name: Build site
         run: mkdocs build --clean --site-dir site

mkdocs.yml

@@ -71,4 +71,4 @@ markdown_extensions:
   - pymdownx.tilde
 
 nav:
-  - Overview: 'Site_README.md'
+  - Overview: 'README.md'