Add updated favicon to documentation website (#299)

.gitignore

@@ -9,15 +9,15 @@ dist/*
 .idea/
 
 # Docs
-_build/*
 .DS_Store
 _site
 .jekyll-cache
 __pycache__
 .vscode/
-/docs/environments/*.md
-!docs/environments/index.md
-!docs/environments/babyAI_index.md
+docs/_build/
+/docs/environments/**/*.md
+/docs/environments/**/*.html
+!/docs/environments/**/index.md
 
 # Virtual environments
 .env