Fixed gh-pages index page

Author: Andrew J Westlake

.github/workflows/guide.yml

@@ -24,7 +24,7 @@ jobs:
           cargo doc --no-deps --features testing
           mkdir -p gh-pages-build
           cp -r target/doc gh-pages-build/doc
-          echo "<meta http-equiv=refresh content=0;url=pyo3/index.html>" > gh-pages-build/doc/index.html
+          echo "<meta http-equiv=refresh content=0;url=pyo3_asyncio/index.html>" > gh-pages-build/doc/index.html
 
       - name: Prepare tag
         id: prepare_tag