Add toml block and style for hugo-hl-example

exampleSite/content/hugo-hl-example/_index.md

@@ -62,7 +62,9 @@ by putting this in `config.toml`:
 {{< highlight toml "style=github" >}}
 
 # use Hugo's hl in markdown (with or without a language tag)
+[markup.highlight]
 codeFences = true
+style = "github"
 pygmentsCodefences = true
 pygmentsCodefencesGuessSyntax = true
 pygmentsStyle = "github"