message: fix admonish
diff: @@ -10,7 +10,7 @@ site-url = "/proof-systems/"
  use-site-url-as-root = true
  curly-quotes = true
  git-repository-url = "https://www.github.com/o1-labs/proof-systems"
  -additional-css = ["./assets/css/mdbook-admonish.css", "././mdbook-admonish.css"]
  +additional-css = ["./assets/css/mdbook-admonish.css"]
  additional-js = ["mermaid.min.js", "mermaid-init.js"]
  # for LaTeX
  