Remove uncompression step (#821)

Author: therve

.github/workflows/docs.yml

@@ -57,10 +57,7 @@ jobs:
       - uses: actions/download-artifact@v2
         with:
           name: documentation
-          path: site.tar.gz
-
-      - name: Uncompress site
-        run: tar xzf site.tar.gz
+          path: site
 
       - uses: peaceiris/actions-gh-pages@v3
         with: