Update mdbook-admonish assets

Author: Bromeon

book.toml

@@ -11,7 +11,7 @@ renderer = ["html"]
 
 [preprocessor.admonish]
 command = "mdbook-admonish"
-assets_version = "2.0.2" # do not edit: managed by `mdbook-admonish install`
+assets_version = "3.0.2" # do not edit: managed by `mdbook-admonish install`
 
 [output.html]
 git-repository-url = "https://github.com/godot-rust/gdnative-book"