doc: update github workflow

.github/workflows/book.yml

@@ -34,6 +34,7 @@ jobs:
                 cargo install mdbook
                 export PATH="$HOME/.cargo/bin:$PATH"
                 cargo install --git "https://github.com/lzanini/mdbook-katex"
+                cargo install --git "https://github.com/badboy/mdbook-toc"
                 sudo apt -y install make
 
             - name: Compile and publish the book

doc/README.md

@@ -11,5 +11,5 @@ For the mdbook-katex backend run:
 
 ```
 cargo install --git "https://github.com/lzanini/mdbook-katex"
-cargo install mdbook-toc
+cargo install --git "https://github.com/badboy/mdbook-toc"
 ```