Remove double add stylesheet v4 recipe

Author: Larocceau

mkdocs.yml

@@ -150,7 +150,6 @@ nav:
       - UI:
           - Add Stylesheet support: "v-4/recipes/ui/add-style.md"
           - Add FontAwesome support: "v4-recipes/ui/add-fontawesome.md"
-          - Add Stylesheet support: "v4-recipes/ui/add-style.md"
           - Add Bulma support: "v4-recipes/ui/add-bulma.md"
           - Use different Bulma Themes: "v4-recipes/ui/use-different-bulma-themes.md"
           - Remove Bulma: "v4-recipes/ui/remove-bulma.md"